Column Letter to Number

Type a column's letters and copy its number, or swap to turn a number back into letters.

Your text type or paste letters

Sample below. Your text takes its place.

Direction: Letters to Number

Sample Number

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Check it fits: limit characters

Have a number? Press Swap first. Each run of one or two letters is read as a column name, A to ZZ. Longer names, and letters joined to a row number as in AB12, stay as typed.

Next step Code a word letter by letter: A is 1, Z is 26 Letters as the digits on a phone key

All 702 column names

A to Z: columns 1 to 26 26

A is column 1 A: the 1st letter, so the 1st column.
B is column 2 B: the 2nd letter, so the 2nd column.
C is column 3 C: the 3rd letter, so the 3rd column.
D is column 4 D: the 4th letter, so the 4th column.
E is column 5 E: the 5th letter, so the 5th column.
F is column 6 F: the 6th letter, so the 6th column.
G is column 7 G: the 7th letter, so the 7th column.
H is column 8 H: the 8th letter, so the 8th column.
I is column 9 I: the 9th letter, so the 9th column.
J is column 10 J: the 10th letter, so the 10th column.
K is column 11 K: the 11th letter, so the 11th column.
L is column 12 L: the 12th letter, so the 12th column.
M is column 13 M: the 13th letter, so the 13th column.
N is column 14 N: the 14th letter, so the 14th column.
O is column 15 O: the 15th letter, so the 15th column.
P is column 16 P: the 16th letter, so the 16th column.

Show all 702 column names (686 more)

A to Z: columns 1 to 26, continued

Q is column 17 Q: the 17th letter, so the 17th column.
R is column 18 R: the 18th letter, so the 18th column.
S is column 19 S: the 19th letter, so the 19th column.
T is column 20 T: the 20th letter, so the 20th column.
U is column 21 U: the 21st letter, so the 21st column.
V is column 22 V: the 22nd letter, so the 22nd column.
W is column 23 W: the 23rd letter, so the 23rd column.
X is column 24 X: the 24th letter, so the 24th column.
Y is column 25 Y: the 25th letter, so the 25th column.
Z is column 26 Z: the 26th letter, so the 26th column. The last one-letter name.

AA to MZ: columns 27 to 364 338

AA is column 27 AA: 1 × 26 + 1 = 27. The first two-letter name, straight after Z.
AB is column 28 AB: 1 × 26 + 2 = 28.
AC is column 29 AC: 1 × 26 + 3 = 29.
AD is column 30 AD: 1 × 26 + 4 = 30.
AE is column 31 AE: 1 × 26 + 5 = 31.
AF is column 32 AF: 1 × 26 + 6 = 32.
AG is column 33 AG: 1 × 26 + 7 = 33.
AH is column 34 AH: 1 × 26 + 8 = 34.
AI is column 35 AI: 1 × 26 + 9 = 35.
AJ is column 36 AJ: 1 × 26 + 10 = 36.
AK is column 37 AK: 1 × 26 + 11 = 37.
AL is column 38 AL: 1 × 26 + 12 = 38.
AM is column 39 AM: 1 × 26 + 13 = 39.
AN is column 40 AN: 1 × 26 + 14 = 40.
AO is column 41 AO: 1 × 26 + 15 = 41.
AP is column 42 AP: 1 × 26 + 16 = 42.
AQ is column 43 AQ: 1 × 26 + 17 = 43.
AR is column 44 AR: 1 × 26 + 18 = 44.
AS is column 45 AS: 1 × 26 + 19 = 45.
AT is column 46 AT: 1 × 26 + 20 = 46.
AU is column 47 AU: 1 × 26 + 21 = 47.
AV is column 48 AV: 1 × 26 + 22 = 48.
AW is column 49 AW: 1 × 26 + 23 = 49.
AX is column 50 AX: 1 × 26 + 24 = 50.
AY is column 51 AY: 1 × 26 + 25 = 51.
AZ is column 52 AZ: 1 × 26 + 26 = 52. The last name that starts with A.
BA is column 53 BA: 2 × 26 + 1 = 53. The first name that starts with B.
BB is column 54 BB: 2 × 26 + 2 = 54.
BC is column 55 BC: 2 × 26 + 3 = 55.
BD is column 56 BD: 2 × 26 + 4 = 56.
BE is column 57 BE: 2 × 26 + 5 = 57.
BF is column 58 BF: 2 × 26 + 6 = 58.
BG is column 59 BG: 2 × 26 + 7 = 59.
BH is column 60 BH: 2 × 26 + 8 = 60.
BI is column 61 BI: 2 × 26 + 9 = 61.
BJ is column 62 BJ: 2 × 26 + 10 = 62.
BK is column 63 BK: 2 × 26 + 11 = 63.
BL is column 64 BL: 2 × 26 + 12 = 64.
BM is column 65 BM: 2 × 26 + 13 = 65.
BN is column 66 BN: 2 × 26 + 14 = 66.
BO is column 67 BO: 2 × 26 + 15 = 67.
BP is column 68 BP: 2 × 26 + 16 = 68.
BQ is column 69 BQ: 2 × 26 + 17 = 69.
BR is column 70 BR: 2 × 26 + 18 = 70.
BS is column 71 BS: 2 × 26 + 19 = 71.
BT is column 72 BT: 2 × 26 + 20 = 72.
BU is column 73 BU: 2 × 26 + 21 = 73.
BV is column 74 BV: 2 × 26 + 22 = 74.
BW is column 75 BW: 2 × 26 + 23 = 75.
BX is column 76 BX: 2 × 26 + 24 = 76.
BY is column 77 BY: 2 × 26 + 25 = 77.
BZ is column 78 BZ: 2 × 26 + 26 = 78.
CA is column 79 CA: 3 × 26 + 1 = 79.
CB is column 80 CB: 3 × 26 + 2 = 80.
CC is column 81 CC: 3 × 26 + 3 = 81.
CD is column 82 CD: 3 × 26 + 4 = 82.
CE is column 83 CE: 3 × 26 + 5 = 83.
CF is column 84 CF: 3 × 26 + 6 = 84.
CG is column 85 CG: 3 × 26 + 7 = 85.
CH is column 86 CH: 3 × 26 + 8 = 86.
CI is column 87 CI: 3 × 26 + 9 = 87.
CJ is column 88 CJ: 3 × 26 + 10 = 88.
CK is column 89 CK: 3 × 26 + 11 = 89.
CL is column 90 CL: 3 × 26 + 12 = 90.
CM is column 91 CM: 3 × 26 + 13 = 91.
CN is column 92 CN: 3 × 26 + 14 = 92.
CO is column 93 CO: 3 × 26 + 15 = 93.
CP is column 94 CP: 3 × 26 + 16 = 94.
CQ is column 95 CQ: 3 × 26 + 17 = 95.
CR is column 96 CR: 3 × 26 + 18 = 96.
CS is column 97 CS: 3 × 26 + 19 = 97.
CT is column 98 CT: 3 × 26 + 20 = 98.
CU is column 99 CU: 3 × 26 + 21 = 99.
CV is column 100 CV: 3 × 26 + 22 = 100.
CW is column 101 CW: 3 × 26 + 23 = 101.
CX is column 102 CX: 3 × 26 + 24 = 102.
CY is column 103 CY: 3 × 26 + 25 = 103.
CZ is column 104 CZ: 3 × 26 + 26 = 104.
DA is column 105 DA: 4 × 26 + 1 = 105.
DB is column 106 DB: 4 × 26 + 2 = 106.
DC is column 107 DC: 4 × 26 + 3 = 107.
DD is column 108 DD: 4 × 26 + 4 = 108.
DE is column 109 DE: 4 × 26 + 5 = 109.
DF is column 110 DF: 4 × 26 + 6 = 110.
DG is column 111 DG: 4 × 26 + 7 = 111.
DH is column 112 DH: 4 × 26 + 8 = 112.
DI is column 113 DI: 4 × 26 + 9 = 113.
DJ is column 114 DJ: 4 × 26 + 10 = 114.
DK is column 115 DK: 4 × 26 + 11 = 115.
DL is column 116 DL: 4 × 26 + 12 = 116.
DM is column 117 DM: 4 × 26 + 13 = 117.
DN is column 118 DN: 4 × 26 + 14 = 118.
DO is column 119 DO: 4 × 26 + 15 = 119.
DP is column 120 DP: 4 × 26 + 16 = 120.
DQ is column 121 DQ: 4 × 26 + 17 = 121.
DR is column 122 DR: 4 × 26 + 18 = 122.
DS is column 123 DS: 4 × 26 + 19 = 123.
DT is column 124 DT: 4 × 26 + 20 = 124.
DU is column 125 DU: 4 × 26 + 21 = 125.
DV is column 126 DV: 4 × 26 + 22 = 126.
DW is column 127 DW: 4 × 26 + 23 = 127.
DX is column 128 DX: 4 × 26 + 24 = 128.
DY is column 129 DY: 4 × 26 + 25 = 129.
DZ is column 130 DZ: 4 × 26 + 26 = 130.
EA is column 131 EA: 5 × 26 + 1 = 131.
EB is column 132 EB: 5 × 26 + 2 = 132.
EC is column 133 EC: 5 × 26 + 3 = 133.
ED is column 134 ED: 5 × 26 + 4 = 134.
EE is column 135 EE: 5 × 26 + 5 = 135.
EF is column 136 EF: 5 × 26 + 6 = 136.
EG is column 137 EG: 5 × 26 + 7 = 137.
EH is column 138 EH: 5 × 26 + 8 = 138.
EI is column 139 EI: 5 × 26 + 9 = 139.
EJ is column 140 EJ: 5 × 26 + 10 = 140.
EK is column 141 EK: 5 × 26 + 11 = 141.
EL is column 142 EL: 5 × 26 + 12 = 142.
EM is column 143 EM: 5 × 26 + 13 = 143.
EN is column 144 EN: 5 × 26 + 14 = 144.
EO is column 145 EO: 5 × 26 + 15 = 145.
EP is column 146 EP: 5 × 26 + 16 = 146.
EQ is column 147 EQ: 5 × 26 + 17 = 147.
ER is column 148 ER: 5 × 26 + 18 = 148.
ES is column 149 ES: 5 × 26 + 19 = 149.
ET is column 150 ET: 5 × 26 + 20 = 150.
EU is column 151 EU: 5 × 26 + 21 = 151.
EV is column 152 EV: 5 × 26 + 22 = 152.
EW is column 153 EW: 5 × 26 + 23 = 153.
EX is column 154 EX: 5 × 26 + 24 = 154.
EY is column 155 EY: 5 × 26 + 25 = 155.
EZ is column 156 EZ: 5 × 26 + 26 = 156.
FA is column 157 FA: 6 × 26 + 1 = 157.
FB is column 158 FB: 6 × 26 + 2 = 158.
FC is column 159 FC: 6 × 26 + 3 = 159.
FD is column 160 FD: 6 × 26 + 4 = 160.
FE is column 161 FE: 6 × 26 + 5 = 161.
FF is column 162 FF: 6 × 26 + 6 = 162.
FG is column 163 FG: 6 × 26 + 7 = 163.
FH is column 164 FH: 6 × 26 + 8 = 164.
FI is column 165 FI: 6 × 26 + 9 = 165.
FJ is column 166 FJ: 6 × 26 + 10 = 166.
FK is column 167 FK: 6 × 26 + 11 = 167.
FL is column 168 FL: 6 × 26 + 12 = 168.
FM is column 169 FM: 6 × 26 + 13 = 169.
FN is column 170 FN: 6 × 26 + 14 = 170.
FO is column 171 FO: 6 × 26 + 15 = 171.
FP is column 172 FP: 6 × 26 + 16 = 172.
FQ is column 173 FQ: 6 × 26 + 17 = 173.
FR is column 174 FR: 6 × 26 + 18 = 174.
FS is column 175 FS: 6 × 26 + 19 = 175.
FT is column 176 FT: 6 × 26 + 20 = 176.
FU is column 177 FU: 6 × 26 + 21 = 177.
FV is column 178 FV: 6 × 26 + 22 = 178.
FW is column 179 FW: 6 × 26 + 23 = 179.
FX is column 180 FX: 6 × 26 + 24 = 180.
FY is column 181 FY: 6 × 26 + 25 = 181.
FZ is column 182 FZ: 6 × 26 + 26 = 182.
GA is column 183 GA: 7 × 26 + 1 = 183.
GB is column 184 GB: 7 × 26 + 2 = 184.
GC is column 185 GC: 7 × 26 + 3 = 185.
GD is column 186 GD: 7 × 26 + 4 = 186.
GE is column 187 GE: 7 × 26 + 5 = 187.
GF is column 188 GF: 7 × 26 + 6 = 188.
GG is column 189 GG: 7 × 26 + 7 = 189.
GH is column 190 GH: 7 × 26 + 8 = 190.
GI is column 191 GI: 7 × 26 + 9 = 191.
GJ is column 192 GJ: 7 × 26 + 10 = 192.
GK is column 193 GK: 7 × 26 + 11 = 193.
GL is column 194 GL: 7 × 26 + 12 = 194.
GM is column 195 GM: 7 × 26 + 13 = 195.
GN is column 196 GN: 7 × 26 + 14 = 196.
GO is column 197 GO: 7 × 26 + 15 = 197.
GP is column 198 GP: 7 × 26 + 16 = 198.
GQ is column 199 GQ: 7 × 26 + 17 = 199.
GR is column 200 GR: 7 × 26 + 18 = 200.
GS is column 201 GS: 7 × 26 + 19 = 201.
GT is column 202 GT: 7 × 26 + 20 = 202.
GU is column 203 GU: 7 × 26 + 21 = 203.
GV is column 204 GV: 7 × 26 + 22 = 204.
GW is column 205 GW: 7 × 26 + 23 = 205.
GX is column 206 GX: 7 × 26 + 24 = 206.
GY is column 207 GY: 7 × 26 + 25 = 207.
GZ is column 208 GZ: 7 × 26 + 26 = 208.
HA is column 209 HA: 8 × 26 + 1 = 209.
HB is column 210 HB: 8 × 26 + 2 = 210.
HC is column 211 HC: 8 × 26 + 3 = 211.
HD is column 212 HD: 8 × 26 + 4 = 212.
HE is column 213 HE: 8 × 26 + 5 = 213.
HF is column 214 HF: 8 × 26 + 6 = 214.
HG is column 215 HG: 8 × 26 + 7 = 215.
HH is column 216 HH: 8 × 26 + 8 = 216.
HI is column 217 HI: 8 × 26 + 9 = 217.
HJ is column 218 HJ: 8 × 26 + 10 = 218.
HK is column 219 HK: 8 × 26 + 11 = 219.
HL is column 220 HL: 8 × 26 + 12 = 220.
HM is column 221 HM: 8 × 26 + 13 = 221.
HN is column 222 HN: 8 × 26 + 14 = 222.
HO is column 223 HO: 8 × 26 + 15 = 223.
HP is column 224 HP: 8 × 26 + 16 = 224.
HQ is column 225 HQ: 8 × 26 + 17 = 225.
HR is column 226 HR: 8 × 26 + 18 = 226.
HS is column 227 HS: 8 × 26 + 19 = 227.
HT is column 228 HT: 8 × 26 + 20 = 228.
HU is column 229 HU: 8 × 26 + 21 = 229.
HV is column 230 HV: 8 × 26 + 22 = 230.
HW is column 231 HW: 8 × 26 + 23 = 231.
HX is column 232 HX: 8 × 26 + 24 = 232.
HY is column 233 HY: 8 × 26 + 25 = 233.
HZ is column 234 HZ: 8 × 26 + 26 = 234.
IA is column 235 IA: 9 × 26 + 1 = 235.
IB is column 236 IB: 9 × 26 + 2 = 236.
IC is column 237 IC: 9 × 26 + 3 = 237.
ID is column 238 ID: 9 × 26 + 4 = 238.
IE is column 239 IE: 9 × 26 + 5 = 239.
IF is column 240 IF: 9 × 26 + 6 = 240.
IG is column 241 IG: 9 × 26 + 7 = 241.
IH is column 242 IH: 9 × 26 + 8 = 242.
II is column 243 II: 9 × 26 + 9 = 243.
IJ is column 244 IJ: 9 × 26 + 10 = 244.
IK is column 245 IK: 9 × 26 + 11 = 245.
IL is column 246 IL: 9 × 26 + 12 = 246.
IM is column 247 IM: 9 × 26 + 13 = 247.
IN is column 248 IN: 9 × 26 + 14 = 248.
IO is column 249 IO: 9 × 26 + 15 = 249.
IP is column 250 IP: 9 × 26 + 16 = 250.
IQ is column 251 IQ: 9 × 26 + 17 = 251.
IR is column 252 IR: 9 × 26 + 18 = 252.
IS is column 253 IS: 9 × 26 + 19 = 253.
IT is column 254 IT: 9 × 26 + 20 = 254.
IU is column 255 IU: 9 × 26 + 21 = 255.
IV is column 256 IV: 9 × 26 + 22 = 256.
IW is column 257 IW: 9 × 26 + 23 = 257.
IX is column 258 IX: 9 × 26 + 24 = 258.
IY is column 259 IY: 9 × 26 + 25 = 259.
IZ is column 260 IZ: 9 × 26 + 26 = 260.
JA is column 261 JA: 10 × 26 + 1 = 261.
JB is column 262 JB: 10 × 26 + 2 = 262.
JC is column 263 JC: 10 × 26 + 3 = 263.
JD is column 264 JD: 10 × 26 + 4 = 264.
JE is column 265 JE: 10 × 26 + 5 = 265.
JF is column 266 JF: 10 × 26 + 6 = 266.
JG is column 267 JG: 10 × 26 + 7 = 267.
JH is column 268 JH: 10 × 26 + 8 = 268.
JI is column 269 JI: 10 × 26 + 9 = 269.
JJ is column 270 JJ: 10 × 26 + 10 = 270.
JK is column 271 JK: 10 × 26 + 11 = 271.
JL is column 272 JL: 10 × 26 + 12 = 272.
JM is column 273 JM: 10 × 26 + 13 = 273.
JN is column 274 JN: 10 × 26 + 14 = 274.
JO is column 275 JO: 10 × 26 + 15 = 275.
JP is column 276 JP: 10 × 26 + 16 = 276.
JQ is column 277 JQ: 10 × 26 + 17 = 277.
JR is column 278 JR: 10 × 26 + 18 = 278.
JS is column 279 JS: 10 × 26 + 19 = 279.
JT is column 280 JT: 10 × 26 + 20 = 280.
JU is column 281 JU: 10 × 26 + 21 = 281.
JV is column 282 JV: 10 × 26 + 22 = 282.
JW is column 283 JW: 10 × 26 + 23 = 283.
JX is column 284 JX: 10 × 26 + 24 = 284.
JY is column 285 JY: 10 × 26 + 25 = 285.
JZ is column 286 JZ: 10 × 26 + 26 = 286.
KA is column 287 KA: 11 × 26 + 1 = 287.
KB is column 288 KB: 11 × 26 + 2 = 288.
KC is column 289 KC: 11 × 26 + 3 = 289.
KD is column 290 KD: 11 × 26 + 4 = 290.
KE is column 291 KE: 11 × 26 + 5 = 291.
KF is column 292 KF: 11 × 26 + 6 = 292.
KG is column 293 KG: 11 × 26 + 7 = 293.
KH is column 294 KH: 11 × 26 + 8 = 294.
KI is column 295 KI: 11 × 26 + 9 = 295.
KJ is column 296 KJ: 11 × 26 + 10 = 296.
KK is column 297 KK: 11 × 26 + 11 = 297.
KL is column 298 KL: 11 × 26 + 12 = 298.
KM is column 299 KM: 11 × 26 + 13 = 299.
KN is column 300 KN: 11 × 26 + 14 = 300.
KO is column 301 KO: 11 × 26 + 15 = 301.
KP is column 302 KP: 11 × 26 + 16 = 302.
KQ is column 303 KQ: 11 × 26 + 17 = 303.
KR is column 304 KR: 11 × 26 + 18 = 304.
KS is column 305 KS: 11 × 26 + 19 = 305.
KT is column 306 KT: 11 × 26 + 20 = 306.
KU is column 307 KU: 11 × 26 + 21 = 307.
KV is column 308 KV: 11 × 26 + 22 = 308.
KW is column 309 KW: 11 × 26 + 23 = 309.
KX is column 310 KX: 11 × 26 + 24 = 310.
KY is column 311 KY: 11 × 26 + 25 = 311.
KZ is column 312 KZ: 11 × 26 + 26 = 312.
LA is column 313 LA: 12 × 26 + 1 = 313.
LB is column 314 LB: 12 × 26 + 2 = 314.
LC is column 315 LC: 12 × 26 + 3 = 315.
LD is column 316 LD: 12 × 26 + 4 = 316.
LE is column 317 LE: 12 × 26 + 5 = 317.
LF is column 318 LF: 12 × 26 + 6 = 318.
LG is column 319 LG: 12 × 26 + 7 = 319.
LH is column 320 LH: 12 × 26 + 8 = 320.
LI is column 321 LI: 12 × 26 + 9 = 321.
LJ is column 322 LJ: 12 × 26 + 10 = 322.
LK is column 323 LK: 12 × 26 + 11 = 323.
LL is column 324 LL: 12 × 26 + 12 = 324.
LM is column 325 LM: 12 × 26 + 13 = 325.
LN is column 326 LN: 12 × 26 + 14 = 326.
LO is column 327 LO: 12 × 26 + 15 = 327.
LP is column 328 LP: 12 × 26 + 16 = 328.
LQ is column 329 LQ: 12 × 26 + 17 = 329.
LR is column 330 LR: 12 × 26 + 18 = 330.
LS is column 331 LS: 12 × 26 + 19 = 331.
LT is column 332 LT: 12 × 26 + 20 = 332.
LU is column 333 LU: 12 × 26 + 21 = 333.
LV is column 334 LV: 12 × 26 + 22 = 334.
LW is column 335 LW: 12 × 26 + 23 = 335.
LX is column 336 LX: 12 × 26 + 24 = 336.
LY is column 337 LY: 12 × 26 + 25 = 337.
LZ is column 338 LZ: 12 × 26 + 26 = 338.
MA is column 339 MA: 13 × 26 + 1 = 339.
MB is column 340 MB: 13 × 26 + 2 = 340.
MC is column 341 MC: 13 × 26 + 3 = 341.
MD is column 342 MD: 13 × 26 + 4 = 342.
ME is column 343 ME: 13 × 26 + 5 = 343.
MF is column 344 MF: 13 × 26 + 6 = 344.
MG is column 345 MG: 13 × 26 + 7 = 345.
MH is column 346 MH: 13 × 26 + 8 = 346.
MI is column 347 MI: 13 × 26 + 9 = 347.
MJ is column 348 MJ: 13 × 26 + 10 = 348.
MK is column 349 MK: 13 × 26 + 11 = 349.
ML is column 350 ML: 13 × 26 + 12 = 350.
MM is column 351 MM: 13 × 26 + 13 = 351.
MN is column 352 MN: 13 × 26 + 14 = 352.
MO is column 353 MO: 13 × 26 + 15 = 353.
MP is column 354 MP: 13 × 26 + 16 = 354.
MQ is column 355 MQ: 13 × 26 + 17 = 355.
MR is column 356 MR: 13 × 26 + 18 = 356.
MS is column 357 MS: 13 × 26 + 19 = 357.
MT is column 358 MT: 13 × 26 + 20 = 358.
MU is column 359 MU: 13 × 26 + 21 = 359.
MV is column 360 MV: 13 × 26 + 22 = 360.
MW is column 361 MW: 13 × 26 + 23 = 361.
MX is column 362 MX: 13 × 26 + 24 = 362.
MY is column 363 MY: 13 × 26 + 25 = 363.
MZ is column 364 MZ: 13 × 26 + 26 = 364. Halfway through the two-letter names.

NA to ZZ: columns 365 to 702 338

NA is column 365 NA: 14 × 26 + 1 = 365.
NB is column 366 NB: 14 × 26 + 2 = 366.
NC is column 367 NC: 14 × 26 + 3 = 367.
ND is column 368 ND: 14 × 26 + 4 = 368.
NE is column 369 NE: 14 × 26 + 5 = 369.
NF is column 370 NF: 14 × 26 + 6 = 370.
NG is column 371 NG: 14 × 26 + 7 = 371.
NH is column 372 NH: 14 × 26 + 8 = 372.
NI is column 373 NI: 14 × 26 + 9 = 373.
NJ is column 374 NJ: 14 × 26 + 10 = 374.
NK is column 375 NK: 14 × 26 + 11 = 375.
NL is column 376 NL: 14 × 26 + 12 = 376.
NM is column 377 NM: 14 × 26 + 13 = 377.
NN is column 378 NN: 14 × 26 + 14 = 378.
NO is column 379 NO: 14 × 26 + 15 = 379.
NP is column 380 NP: 14 × 26 + 16 = 380.
NQ is column 381 NQ: 14 × 26 + 17 = 381.
NR is column 382 NR: 14 × 26 + 18 = 382.
NS is column 383 NS: 14 × 26 + 19 = 383.
NT is column 384 NT: 14 × 26 + 20 = 384.
NU is column 385 NU: 14 × 26 + 21 = 385.
NV is column 386 NV: 14 × 26 + 22 = 386.
NW is column 387 NW: 14 × 26 + 23 = 387.
NX is column 388 NX: 14 × 26 + 24 = 388.
NY is column 389 NY: 14 × 26 + 25 = 389.
NZ is column 390 NZ: 14 × 26 + 26 = 390.
OA is column 391 OA: 15 × 26 + 1 = 391.
OB is column 392 OB: 15 × 26 + 2 = 392.
OC is column 393 OC: 15 × 26 + 3 = 393.
OD is column 394 OD: 15 × 26 + 4 = 394.
OE is column 395 OE: 15 × 26 + 5 = 395.
OF is column 396 OF: 15 × 26 + 6 = 396.
OG is column 397 OG: 15 × 26 + 7 = 397.
OH is column 398 OH: 15 × 26 + 8 = 398.
OI is column 399 OI: 15 × 26 + 9 = 399.
OJ is column 400 OJ: 15 × 26 + 10 = 400.
OK is column 401 OK: 15 × 26 + 11 = 401.
OL is column 402 OL: 15 × 26 + 12 = 402.
OM is column 403 OM: 15 × 26 + 13 = 403.
ON is column 404 ON: 15 × 26 + 14 = 404.
OO is column 405 OO: 15 × 26 + 15 = 405.
OP is column 406 OP: 15 × 26 + 16 = 406.
OQ is column 407 OQ: 15 × 26 + 17 = 407.
OR is column 408 OR: 15 × 26 + 18 = 408.
OS is column 409 OS: 15 × 26 + 19 = 409.
OT is column 410 OT: 15 × 26 + 20 = 410.
OU is column 411 OU: 15 × 26 + 21 = 411.
OV is column 412 OV: 15 × 26 + 22 = 412.
OW is column 413 OW: 15 × 26 + 23 = 413.
OX is column 414 OX: 15 × 26 + 24 = 414.
OY is column 415 OY: 15 × 26 + 25 = 415.
OZ is column 416 OZ: 15 × 26 + 26 = 416.
PA is column 417 PA: 16 × 26 + 1 = 417.
PB is column 418 PB: 16 × 26 + 2 = 418.
PC is column 419 PC: 16 × 26 + 3 = 419.
PD is column 420 PD: 16 × 26 + 4 = 420.
PE is column 421 PE: 16 × 26 + 5 = 421.
PF is column 422 PF: 16 × 26 + 6 = 422.
PG is column 423 PG: 16 × 26 + 7 = 423.
PH is column 424 PH: 16 × 26 + 8 = 424.
PI is column 425 PI: 16 × 26 + 9 = 425.
PJ is column 426 PJ: 16 × 26 + 10 = 426.
PK is column 427 PK: 16 × 26 + 11 = 427.
PL is column 428 PL: 16 × 26 + 12 = 428.
PM is column 429 PM: 16 × 26 + 13 = 429.
PN is column 430 PN: 16 × 26 + 14 = 430.
PO is column 431 PO: 16 × 26 + 15 = 431.
PP is column 432 PP: 16 × 26 + 16 = 432.
PQ is column 433 PQ: 16 × 26 + 17 = 433.
PR is column 434 PR: 16 × 26 + 18 = 434.
PS is column 435 PS: 16 × 26 + 19 = 435.
PT is column 436 PT: 16 × 26 + 20 = 436.
PU is column 437 PU: 16 × 26 + 21 = 437.
PV is column 438 PV: 16 × 26 + 22 = 438.
PW is column 439 PW: 16 × 26 + 23 = 439.
PX is column 440 PX: 16 × 26 + 24 = 440.
PY is column 441 PY: 16 × 26 + 25 = 441.
PZ is column 442 PZ: 16 × 26 + 26 = 442.
QA is column 443 QA: 17 × 26 + 1 = 443.
QB is column 444 QB: 17 × 26 + 2 = 444.
QC is column 445 QC: 17 × 26 + 3 = 445.
QD is column 446 QD: 17 × 26 + 4 = 446.
QE is column 447 QE: 17 × 26 + 5 = 447.
QF is column 448 QF: 17 × 26 + 6 = 448.
QG is column 449 QG: 17 × 26 + 7 = 449.
QH is column 450 QH: 17 × 26 + 8 = 450.
QI is column 451 QI: 17 × 26 + 9 = 451.
QJ is column 452 QJ: 17 × 26 + 10 = 452.
QK is column 453 QK: 17 × 26 + 11 = 453.
QL is column 454 QL: 17 × 26 + 12 = 454.
QM is column 455 QM: 17 × 26 + 13 = 455.
QN is column 456 QN: 17 × 26 + 14 = 456.
QO is column 457 QO: 17 × 26 + 15 = 457.
QP is column 458 QP: 17 × 26 + 16 = 458.
QQ is column 459 QQ: 17 × 26 + 17 = 459.
QR is column 460 QR: 17 × 26 + 18 = 460.
QS is column 461 QS: 17 × 26 + 19 = 461.
QT is column 462 QT: 17 × 26 + 20 = 462.
QU is column 463 QU: 17 × 26 + 21 = 463.
QV is column 464 QV: 17 × 26 + 22 = 464.
QW is column 465 QW: 17 × 26 + 23 = 465.
QX is column 466 QX: 17 × 26 + 24 = 466.
QY is column 467 QY: 17 × 26 + 25 = 467.
QZ is column 468 QZ: 17 × 26 + 26 = 468.
RA is column 469 RA: 18 × 26 + 1 = 469.
RB is column 470 RB: 18 × 26 + 2 = 470.
RC is column 471 RC: 18 × 26 + 3 = 471.
RD is column 472 RD: 18 × 26 + 4 = 472.
RE is column 473 RE: 18 × 26 + 5 = 473.
RF is column 474 RF: 18 × 26 + 6 = 474.
RG is column 475 RG: 18 × 26 + 7 = 475.
RH is column 476 RH: 18 × 26 + 8 = 476.
RI is column 477 RI: 18 × 26 + 9 = 477.
RJ is column 478 RJ: 18 × 26 + 10 = 478.
RK is column 479 RK: 18 × 26 + 11 = 479.
RL is column 480 RL: 18 × 26 + 12 = 480.
RM is column 481 RM: 18 × 26 + 13 = 481.
RN is column 482 RN: 18 × 26 + 14 = 482.
RO is column 483 RO: 18 × 26 + 15 = 483.
RP is column 484 RP: 18 × 26 + 16 = 484.
RQ is column 485 RQ: 18 × 26 + 17 = 485.
RR is column 486 RR: 18 × 26 + 18 = 486.
RS is column 487 RS: 18 × 26 + 19 = 487.
RT is column 488 RT: 18 × 26 + 20 = 488.
RU is column 489 RU: 18 × 26 + 21 = 489.
RV is column 490 RV: 18 × 26 + 22 = 490.
RW is column 491 RW: 18 × 26 + 23 = 491.
RX is column 492 RX: 18 × 26 + 24 = 492.
RY is column 493 RY: 18 × 26 + 25 = 493.
RZ is column 494 RZ: 18 × 26 + 26 = 494.
SA is column 495 SA: 19 × 26 + 1 = 495.
SB is column 496 SB: 19 × 26 + 2 = 496.
SC is column 497 SC: 19 × 26 + 3 = 497.
SD is column 498 SD: 19 × 26 + 4 = 498.
SE is column 499 SE: 19 × 26 + 5 = 499.
SF is column 500 SF: 19 × 26 + 6 = 500.
SG is column 501 SG: 19 × 26 + 7 = 501.
SH is column 502 SH: 19 × 26 + 8 = 502.
SI is column 503 SI: 19 × 26 + 9 = 503.
SJ is column 504 SJ: 19 × 26 + 10 = 504.
SK is column 505 SK: 19 × 26 + 11 = 505.
SL is column 506 SL: 19 × 26 + 12 = 506.
SM is column 507 SM: 19 × 26 + 13 = 507.
SN is column 508 SN: 19 × 26 + 14 = 508.
SO is column 509 SO: 19 × 26 + 15 = 509.
SP is column 510 SP: 19 × 26 + 16 = 510.
SQ is column 511 SQ: 19 × 26 + 17 = 511.
SR is column 512 SR: 19 × 26 + 18 = 512.
SS is column 513 SS: 19 × 26 + 19 = 513.
ST is column 514 ST: 19 × 26 + 20 = 514.
SU is column 515 SU: 19 × 26 + 21 = 515.
SV is column 516 SV: 19 × 26 + 22 = 516.
SW is column 517 SW: 19 × 26 + 23 = 517.
SX is column 518 SX: 19 × 26 + 24 = 518.
SY is column 519 SY: 19 × 26 + 25 = 519.
SZ is column 520 SZ: 19 × 26 + 26 = 520.
TA is column 521 TA: 20 × 26 + 1 = 521.
TB is column 522 TB: 20 × 26 + 2 = 522.
TC is column 523 TC: 20 × 26 + 3 = 523.
TD is column 524 TD: 20 × 26 + 4 = 524.
TE is column 525 TE: 20 × 26 + 5 = 525.
TF is column 526 TF: 20 × 26 + 6 = 526.
TG is column 527 TG: 20 × 26 + 7 = 527.
TH is column 528 TH: 20 × 26 + 8 = 528.
TI is column 529 TI: 20 × 26 + 9 = 529.
TJ is column 530 TJ: 20 × 26 + 10 = 530.
TK is column 531 TK: 20 × 26 + 11 = 531.
TL is column 532 TL: 20 × 26 + 12 = 532.
TM is column 533 TM: 20 × 26 + 13 = 533.
TN is column 534 TN: 20 × 26 + 14 = 534.
TO is column 535 TO: 20 × 26 + 15 = 535.
TP is column 536 TP: 20 × 26 + 16 = 536.
TQ is column 537 TQ: 20 × 26 + 17 = 537.
TR is column 538 TR: 20 × 26 + 18 = 538.
TS is column 539 TS: 20 × 26 + 19 = 539.
TT is column 540 TT: 20 × 26 + 20 = 540.
TU is column 541 TU: 20 × 26 + 21 = 541.
TV is column 542 TV: 20 × 26 + 22 = 542.
TW is column 543 TW: 20 × 26 + 23 = 543.
TX is column 544 TX: 20 × 26 + 24 = 544.
TY is column 545 TY: 20 × 26 + 25 = 545.
TZ is column 546 TZ: 20 × 26 + 26 = 546.
UA is column 547 UA: 21 × 26 + 1 = 547.
UB is column 548 UB: 21 × 26 + 2 = 548.
UC is column 549 UC: 21 × 26 + 3 = 549.
UD is column 550 UD: 21 × 26 + 4 = 550.
UE is column 551 UE: 21 × 26 + 5 = 551.
UF is column 552 UF: 21 × 26 + 6 = 552.
UG is column 553 UG: 21 × 26 + 7 = 553.
UH is column 554 UH: 21 × 26 + 8 = 554.
UI is column 555 UI: 21 × 26 + 9 = 555.
UJ is column 556 UJ: 21 × 26 + 10 = 556.
UK is column 557 UK: 21 × 26 + 11 = 557.
UL is column 558 UL: 21 × 26 + 12 = 558.
UM is column 559 UM: 21 × 26 + 13 = 559.
UN is column 560 UN: 21 × 26 + 14 = 560.
UO is column 561 UO: 21 × 26 + 15 = 561.
UP is column 562 UP: 21 × 26 + 16 = 562.
UQ is column 563 UQ: 21 × 26 + 17 = 563.
UR is column 564 UR: 21 × 26 + 18 = 564.
US is column 565 US: 21 × 26 + 19 = 565.
UT is column 566 UT: 21 × 26 + 20 = 566.
UU is column 567 UU: 21 × 26 + 21 = 567.
UV is column 568 UV: 21 × 26 + 22 = 568.
UW is column 569 UW: 21 × 26 + 23 = 569.
UX is column 570 UX: 21 × 26 + 24 = 570.
UY is column 571 UY: 21 × 26 + 25 = 571.
UZ is column 572 UZ: 21 × 26 + 26 = 572.
VA is column 573 VA: 22 × 26 + 1 = 573.
VB is column 574 VB: 22 × 26 + 2 = 574.
VC is column 575 VC: 22 × 26 + 3 = 575.
VD is column 576 VD: 22 × 26 + 4 = 576.
VE is column 577 VE: 22 × 26 + 5 = 577.
VF is column 578 VF: 22 × 26 + 6 = 578.
VG is column 579 VG: 22 × 26 + 7 = 579.
VH is column 580 VH: 22 × 26 + 8 = 580.
VI is column 581 VI: 22 × 26 + 9 = 581.
VJ is column 582 VJ: 22 × 26 + 10 = 582.
VK is column 583 VK: 22 × 26 + 11 = 583.
VL is column 584 VL: 22 × 26 + 12 = 584.
VM is column 585 VM: 22 × 26 + 13 = 585.
VN is column 586 VN: 22 × 26 + 14 = 586.
VO is column 587 VO: 22 × 26 + 15 = 587.
VP is column 588 VP: 22 × 26 + 16 = 588.
VQ is column 589 VQ: 22 × 26 + 17 = 589.
VR is column 590 VR: 22 × 26 + 18 = 590.
VS is column 591 VS: 22 × 26 + 19 = 591.
VT is column 592 VT: 22 × 26 + 20 = 592.
VU is column 593 VU: 22 × 26 + 21 = 593.
VV is column 594 VV: 22 × 26 + 22 = 594.
VW is column 595 VW: 22 × 26 + 23 = 595.
VX is column 596 VX: 22 × 26 + 24 = 596.
VY is column 597 VY: 22 × 26 + 25 = 597.
VZ is column 598 VZ: 22 × 26 + 26 = 598.
WA is column 599 WA: 23 × 26 + 1 = 599.
WB is column 600 WB: 23 × 26 + 2 = 600.
WC is column 601 WC: 23 × 26 + 3 = 601.
WD is column 602 WD: 23 × 26 + 4 = 602.
WE is column 603 WE: 23 × 26 + 5 = 603.
WF is column 604 WF: 23 × 26 + 6 = 604.
WG is column 605 WG: 23 × 26 + 7 = 605.
WH is column 606 WH: 23 × 26 + 8 = 606.
WI is column 607 WI: 23 × 26 + 9 = 607.
WJ is column 608 WJ: 23 × 26 + 10 = 608.
WK is column 609 WK: 23 × 26 + 11 = 609.
WL is column 610 WL: 23 × 26 + 12 = 610.
WM is column 611 WM: 23 × 26 + 13 = 611.
WN is column 612 WN: 23 × 26 + 14 = 612.
WO is column 613 WO: 23 × 26 + 15 = 613.
WP is column 614 WP: 23 × 26 + 16 = 614.
WQ is column 615 WQ: 23 × 26 + 17 = 615.
WR is column 616 WR: 23 × 26 + 18 = 616.
WS is column 617 WS: 23 × 26 + 19 = 617.
WT is column 618 WT: 23 × 26 + 20 = 618.
WU is column 619 WU: 23 × 26 + 21 = 619.
WV is column 620 WV: 23 × 26 + 22 = 620.
WW is column 621 WW: 23 × 26 + 23 = 621.
WX is column 622 WX: 23 × 26 + 24 = 622.
WY is column 623 WY: 23 × 26 + 25 = 623.
WZ is column 624 WZ: 23 × 26 + 26 = 624.
XA is column 625 XA: 24 × 26 + 1 = 625.
XB is column 626 XB: 24 × 26 + 2 = 626.
XC is column 627 XC: 24 × 26 + 3 = 627.
XD is column 628 XD: 24 × 26 + 4 = 628.
XE is column 629 XE: 24 × 26 + 5 = 629.
XF is column 630 XF: 24 × 26 + 6 = 630.
XG is column 631 XG: 24 × 26 + 7 = 631.
XH is column 632 XH: 24 × 26 + 8 = 632.
XI is column 633 XI: 24 × 26 + 9 = 633.
XJ is column 634 XJ: 24 × 26 + 10 = 634.
XK is column 635 XK: 24 × 26 + 11 = 635.
XL is column 636 XL: 24 × 26 + 12 = 636.
XM is column 637 XM: 24 × 26 + 13 = 637.
XN is column 638 XN: 24 × 26 + 14 = 638.
XO is column 639 XO: 24 × 26 + 15 = 639.
XP is column 640 XP: 24 × 26 + 16 = 640.
XQ is column 641 XQ: 24 × 26 + 17 = 641.
XR is column 642 XR: 24 × 26 + 18 = 642.
XS is column 643 XS: 24 × 26 + 19 = 643.
XT is column 644 XT: 24 × 26 + 20 = 644.
XU is column 645 XU: 24 × 26 + 21 = 645.
XV is column 646 XV: 24 × 26 + 22 = 646.
XW is column 647 XW: 24 × 26 + 23 = 647.
XX is column 648 XX: 24 × 26 + 24 = 648.
XY is column 649 XY: 24 × 26 + 25 = 649.
XZ is column 650 XZ: 24 × 26 + 26 = 650.
YA is column 651 YA: 25 × 26 + 1 = 651.
YB is column 652 YB: 25 × 26 + 2 = 652.
YC is column 653 YC: 25 × 26 + 3 = 653.
YD is column 654 YD: 25 × 26 + 4 = 654.
YE is column 655 YE: 25 × 26 + 5 = 655.
YF is column 656 YF: 25 × 26 + 6 = 656.
YG is column 657 YG: 25 × 26 + 7 = 657.
YH is column 658 YH: 25 × 26 + 8 = 658.
YI is column 659 YI: 25 × 26 + 9 = 659.
YJ is column 660 YJ: 25 × 26 + 10 = 660.
YK is column 661 YK: 25 × 26 + 11 = 661.
YL is column 662 YL: 25 × 26 + 12 = 662.
YM is column 663 YM: 25 × 26 + 13 = 663.
YN is column 664 YN: 25 × 26 + 14 = 664.
YO is column 665 YO: 25 × 26 + 15 = 665.
YP is column 666 YP: 25 × 26 + 16 = 666.
YQ is column 667 YQ: 25 × 26 + 17 = 667.
YR is column 668 YR: 25 × 26 + 18 = 668.
YS is column 669 YS: 25 × 26 + 19 = 669.
YT is column 670 YT: 25 × 26 + 20 = 670.
YU is column 671 YU: 25 × 26 + 21 = 671.
YV is column 672 YV: 25 × 26 + 22 = 672.
YW is column 673 YW: 25 × 26 + 23 = 673.
YX is column 674 YX: 25 × 26 + 24 = 674.
YY is column 675 YY: 25 × 26 + 25 = 675.
YZ is column 676 YZ: 25 × 26 + 26 = 676.
ZA is column 677 ZA: 26 × 26 + 1 = 677.
ZB is column 678 ZB: 26 × 26 + 2 = 678.
ZC is column 679 ZC: 26 × 26 + 3 = 679.
ZD is column 680 ZD: 26 × 26 + 4 = 680.
ZE is column 681 ZE: 26 × 26 + 5 = 681.
ZF is column 682 ZF: 26 × 26 + 6 = 682.
ZG is column 683 ZG: 26 × 26 + 7 = 683.
ZH is column 684 ZH: 26 × 26 + 8 = 684.
ZI is column 685 ZI: 26 × 26 + 9 = 685.
ZJ is column 686 ZJ: 26 × 26 + 10 = 686.
ZK is column 687 ZK: 26 × 26 + 11 = 687.
ZL is column 688 ZL: 26 × 26 + 12 = 688.
ZM is column 689 ZM: 26 × 26 + 13 = 689.
ZN is column 690 ZN: 26 × 26 + 14 = 690.
ZO is column 691 ZO: 26 × 26 + 15 = 691.
ZP is column 692 ZP: 26 × 26 + 16 = 692.
ZQ is column 693 ZQ: 26 × 26 + 17 = 693.
ZR is column 694 ZR: 26 × 26 + 18 = 694.
ZS is column 695 ZS: 26 × 26 + 19 = 695.
ZT is column 696 ZT: 26 × 26 + 20 = 696.
ZU is column 697 ZU: 26 × 26 + 21 = 697.
ZV is column 698 ZV: 26 × 26 + 22 = 698.
ZW is column 699 ZW: 26 × 26 + 23 = 699.
ZX is column 700 ZX: 26 × 26 + 24 = 700.
ZY is column 701 ZY: 26 × 26 + 25 = 701.
ZZ is column 702 ZZ: 26 × 26 + 26 = 702. The last two-letter name. Column 703 is AAA.

How this list was compiled: Own work, arithmetic only: every column name from A to ZZ with its position, counted the way a spreadsheet letters its columns (A to Z, then AA, AB and on to ZZ, then AAA). That naming is as given in the article Bijective numeration, section The bijective base-26 system, https://en.wikipedia.org/wiki/Bijective_numeration, read on 2026-10-07. Every one of the 702 rows was turned back from its number into its name and compared, the sum printed in each two-letter row was checked, and every row was tried in the converter above, there and back. Licence: own work

How it works

A spreadsheet letters its columns A to Z, then AA, AB and on. This column letter to number converter gives a name's position, so AB is column 28.

Read the full guide

Letters in, number out

Type the letters from the top of the column, in capitals or small letters. Several names with commas or spaces between them are converted in one go: AB, AZ, ZZ gives 28, 52, 702.

The rule, for names past ZZ

Each letter counts as its place in the alphabet, A as 1 to Z as 26, and every step to the left is worth 26 times more. There is no zero, which is why AA follows Z. So AAA is 1 × 676 + 1 × 26 + 1 = 703.

If your code counts columns from zero, take 1 off the answer: column AB is index 27.

Questions and answers

How do I convert a column letter to a number by hand?

For one letter, count its place in the alphabet. For two, multiply the first letter's place by 26 and add the second's: BC is 2 × 26 + 3 = 55.

What number is column AA?

27. Z is the 26th column, and after it the names start again with two letters, so AA is 27 and AB is 28.

How do I convert a column number to a letter?

Press Swap and type the number. By hand, divide by 26: the remainder is the last letter and the quotient is the letter in front. 55 is 2 remainder 3, so BC. A remainder of 0 means Z, with 1 taken off the quotient.