Row lenght

per seats quantity

Flat inches sizes (2″ side slack each end)

Size→181920212223
Seats↓
1222324252627
2404244464850
3586164677073
4768084889296
59499104109114119
6112118124130136142
7130137144151158165
8148156164172180188
9166175184193202211
10184194204214224234
11202213224235246257
12220232244256268280
13238251264277290303
14256270284298312326
15274289304319334349
16292308324340356372
17310327344361378395
18328346364382400418
19346365384403422441
20364384404424444464
21382403424445466487
22400422444466488510
23418441464487510533
24436460484508532556
Allowance4"total

1/16″ sizes (2″ side slack each end)

Size→19 11/1620 11/1621 11/1622 5/8
Seats↓
123 11/1624 11/1625 11/1626 5/8
243 3/8 45 3/8 47 3/8 49 1/4
363 1/1666 1/1669 1/1671 7/8
482 3/4 86 3/4 90 3/4 94 1/2
5102 7/16107 7/16112 7/16117 1/8
6122 1/8 128 1/8 134 1/8 139 3/4
7141 13/16148 13/16155 13/16162 3/8
8161 1/2 169 1/2 177 1/2 185
9181 3/16190 3/16199 3/16207 5/8
10200 7/8 210 7/8 220 7/8 230 1/4
11220 9/16231 9/16242 9/16252 7/8
12240 1/4 252 1/4 264 1/4 275 1/2
13259 15/16272 15/16285 15/16298 1/8
14279 5/8 293 5/8 307 5/8 320 3/4
15299 5/16314 5/16329 5/16343 3/8
16319 335 351 366
17338 11/16355 11/16372 11/16388 5/8
18358 3/8 376 3/8 394 3/8 411 1/4
19378 1/16397 1/16416 1/16433 7/8
20397 3/4 417 3/4 437 3/4 456 1/2
21417 7/16438 7/16459 7/16479 1/8
22437 1/8 459 1/8 481 1/8 501 3/4
23456 13/16479 13/16502 13/16524 3/8
24476 1/2 500 1/2 524 1/2 547
Allowance4"total

1/8″ sizes (2 1/2″ side slack each end)

Size→19 1/820 1/821 1/822 1/823 1/824 1/8
Seats↓
124 1/825 1/826 1/827 1/828 1/829 1/8
243 1/445 1/447 1/449 1/451 1/453 1/4
362 3/865 3/868 3/871 3/874 3/877 3/8
481 1/285 1/289 1/293 1/297 1/2101 1/2
5100 5/8105 5/8110 5/8115 5/8120 5/8125 5/8
6119 3/4125 3/4131 3/4137 3/4143 3/4149 3/4
7138 7/8145 7/8152 7/8159 7/8166 7/8173 7/8
8158 166 174 182 190 198
9177 1/8186 1/8195 1/8204 1/8213 1/8222 1/8
10196 1/4206 1/4216 1/4226 1/4236 1/4246 1/4
11215 3/8226 3/8237 3/8248 3/8259 3/8270 3/8
12234 1/2246 1/2258 1/2270 1/2282 1/2294 1/2
13253 5/8266 5/8279 5/8292 5/8305 5/8318 5/8
14272 3/4286 3/4300 3/4314 3/4328 3/4342 3/4
15291 7/8306 7/8321 7/8336 7/8351 7/8366 7/8
16311 327 343 359 375 391
17330 1/8347 1/8364 1/8381 1/8398 1/8415 1/8
18349 1/4367 1/4385 1/4403 1/4421 1/4439 1/4
19368 3/8387 3/8406 3/8425 3/8444 3/8463 3/8
20387 1/2407 1/2427 1/2447 1/2467 1/2487 1/2
21406 5/8427 5/8448 5/8469 5/8490 5/8511 5/8
22425 3/4447 3/4469 3/4491 3/4513 3/4535 3/4
23444 7/8467 7/8490 7/8513 7/8536 7/8559 7/8
24464 488 512 536 560 584
Allowance5"total

1/8″ sizes (3″ side slack each end)

Size→19 1/820 1/821 1/822 1/823 1/824 1/8
Seats↓
125 1/826 1/827 1/828 1/829 1/830 1/8
244 1/446 1/448 1/450 1/452 1/454 1/4
363 3/866 3/869 3/872 3/875 3/878 3/8
482 1/286 1/290 1/294 1/298 1/2102 1/2
5101 5/8106 5/8111 5/8116 5/8121 5/8126 5/8
6120 3/4126 3/4132 3/4138 3/4144 3/4150 3/4
7139 7/8146 7/8153 7/8160 7/8167 7/8174 7/8
8159 167 175 183 191 199
9178 1/8187 1/8196 1/8205 1/8214 1/8223 1/8
10197 1/4207 1/4217 1/4227 1/4237 1/4247 1/4
11216 3/8227 3/8238 3/8249 3/8260 3/8271 3/8
12235 1/2247 1/2259 1/2271 1/2283 1/2295 1/2
13254 5/8267 5/8280 5/8293 5/8306 5/8319 5/8
14273 3/4287 3/4301 3/4315 3/4329 3/4343 3/4
15292 7/8307 7/8322 7/8337 7/8352 7/8367 7/8
16312 328 344 360 376 392
17331 1/8348 1/8365 1/8382 1/8399 1/8416 1/8
18350 1/4368 1/4386 1/4404 1/4422 1/4440 1/4
19369 3/8388 3/8407 3/8426 3/8445 3/8464 3/8
20388 1/2408 1/2428 1/2448 1/2468 1/2488 1/2
21407 5/8428 5/8449 5/8470 5/8491 5/8512 5/8
22426 3/4448 3/4470 3/4492 3/4514 3/4536 3/4
23445 7/8468 7/8491 7/8514 7/8537 7/8560 7/8
24465 489 513 537 561 585
Allowance6"total

1/4″ sizes (2″ side slack each end)

Size→19 1/420 1/421 1/422 1/4
Seats↓
123 1/424 1/425 1/426 1/4
242 1/244 1/246 1/248 1/2
361 3/464 3/467 3/470 3/4
481 85 89 93
5100 1/4105 1/4110 1/4115 1/4
6119 1/2125 1/2131 1/2137 1/2
7138 3/4145 3/4152 3/4159 3/4
8158 166 174 182
9177 1/4186 1/4195 1/4204 1/4
10196 1/2206 1/2216 1/2226 1/2
11215 3/4226 3/4237 3/4248 3/4
12235 247 259 271
13254 1/4267 1/4280 1/4293 1/4
14273 1/2287 1/2301 1/2315 1/2
15292 3/4307 3/4322 3/4337 3/4
16312 328 344 360
17331 1/4348 1/4365 1/4382 1/4
18350 1/2368 1/2386 1/2404 1/2
19369 3/4388 3/4407 3/4426 3/4
20389 409 429 449
21408 1/4429 1/4450 1/4471 1/4
22427 1/2449 1/2471 1/2493 1/2
23446 3/4469 3/4492 3/4515 3/4
24466 490 514 538
Allowance4"total

1/4″ step sizes 21 to 22 1/4″ (3″ side slack each end)

Size→2121 1/421 1/221 3/42222 1/4
Seats↓
127 27 1/427 1/227 3/428 28 1/4
248 48 1/249 49 1/250 50 1/2
369 69 3/470 1/271 1/472 72 3/4
490 91 92 93 94 95
5111 112 1/4113 1/2114 3/4116 117 1/4
6132 133 1/2135 136 1/2138 139 1/2
7153 154 3/4156 1/2158 1/4160 161 3/4
8174 176 178 180 182 184
9195 197 1/4199 1/2201 3/4204 206 1/4
10216 218 1/2221 223 1/2226 228 1/2
11237 239 3/4242 1/2245 1/4248 250 3/4
12258 261 264 267 270 273
13279 282 1/4285 1/2288 3/4292 295 1/4
14300 303 1/2307 310 1/2314 317 1/2
15321 324 3/4328 1/2332 1/4336 339 3/4
16342 346 350 354 358 362
17363 367 1/4371 1/2375 3/4380 384 1/4
18384 388 1/2393 397 1/2402 406 1/2
19405 409 3/4414 1/2419 1/4424 428 3/4
20426 431 436 441 446 451
21447 452 1/4457 1/2462 3/4468 473 1/4
22468 473 1/2479 484 1/2490 495 1/2
23489 494 3/4500 1/2506 1/4512 517 3/4
24510 516 522 528 534 540
Allowance6"total

1/4″ step sizes 22 1/2″ to 23 3/4″ (3″ side slack each end)

Size→22 1/222 3/42323 1/423 1/223 3/4
Seats↓
128 1/228 3/429 29 1/429 1/229 3/4
251 51 1/252 52 1/253 53 1/2
373 1/274 1/475 75 3/476 1/277 1/4
496 97 98 99 100 101
5118 1/2119 3/4121 122 1/4123 1/2124 3/4
6141 142 1/2144 145 1/2147 148 1/2
7163 1/2165 1/4167 168 3/4170 1/2172 1/4
8186 188 190 192 194 196
9208 1/2210 3/4213 215 1/4217 1/2219 3/4
10231 233 1/2236 238 1/2241 243 1/2
11253 1/2256 1/4259 261 3/4264 1/2267 1/4
12276 279 282 285 288 291
13298 1/2301 3/4305 308 1/4311 1/2314 3/4
14321 324 1/2328 331 1/2335 338 1/2
15343 1/2347 1/4351 354 3/4358 1/2362 1/4
16366 370 374 378 382 386
17388 1/2392 3/4397 401 1/4405 1/2409 3/4
18411 415 1/2420 424 1/2429 433 1/2
19433 1/2438 1/4443 447 3/4452 1/2457 1/4
20456 461 466 471 476 481
21478 1/2483 3/4489 494 1/4499 1/2504 3/4
22501 506 1/2512 517 1/2523 528 1/2
23523 1/2529 1/4535 540 3/4546 1/2552 1/4
24546 552 558 564 570 576
Allowance6"total

1/4″ step sizes 24″ to 25″ (3″ and 3 1/2″ side slack each end)

Size→242424 1/424 1/224 3/425
Seats↓
130 31 31 1/4 31 1/2 31 3/4 32
254 55 55 1/2 56 56 1/2 57
378 79 79 3/4 80 1/2 81 1/4 82
4102 103 104 105 106 107
5126 127 128 1/4 129 1/2 130 3/4 132
6150 151 152 1/2 154 155 1/2 157
7174 175 176 3/4 178 1/2 180 1/4 182
8198 199 201 203 205 207
9222 223 225 1/4 227 1/2 229 3/4 232
10246 247 249 1/2 252 254 1/2 257
11270 271 273 3/4 276 1/2 279 1/4 282
12294 295 298 301 304 307
13318 319 322 1/4 325 1/2 328 3/4 332
14342 343 346 1/2 350 353 1/2 357
15366 367 370 3/4 374 1/2 378 1/4 382
16390 391 395 399 403 407
17414 415 419 1/4 423 1/2 427 3/4 432
18438 439 443 1/2 448 452 1/2 457
19462 463 467 3/4 472 1/2 477 1/4 482
20486 487 492 497 502 507
21510 511 516 1/4 521 1/2 526 3/4 532
22534 535 540 1/2 546 551 1/2 557
23558 559 564 3/4 570 1/2 576 1/4 582
24582 583 589 595 601 607
Allowance6"7"7"7"7"7"

1/4″ step sizes 25 1/4″ to 27 1/4″ (3 1/2″ and 2 7/8″ side slack each end)

Size→25 1/425 1/225 3/42627 1/4
Seats↓
132 1/4 32 1/2 32 3/4 33 33
257 1/2 58 58 1/2 59 60 1/4
382 3/4 83 1/2 84 1/4 85 87 1/2
4108 109 110 111 114 3/4
5133 1/4 134 1/2 135 3/4 137 142
6158 1/2 160 161 1/2 163 169 1/4
7183 3/4 185 1/2 187 1/4 189 196 1/2
8209 211 213 215 223 3/4
9234 1/4 236 1/2 238 3/4 241 251
10259 1/2 262 264 1/2 267 278 1/4
11284 3/4 287 1/2 290 1/4 293 305 1/2
12310 313 316 319 332 3/4
13335 1/4 338 1/2 341 3/4 345 360
14360 1/2 364 367 1/2 371 387 1/4
15385 3/4 389 1/2 393 1/4 397 414 1/2
16411 415 419 423 441 3/4
17436 1/4 440 1/2 444 3/4 449 469
18461 1/2 466 470 1/2 475 496 1/4
19486 3/4 491 1/2 496 1/4 501 523 1/2
20512 517 522 527 550 3/4
21537 1/4 542 1/2 547 3/4 553 578
22562 1/2 568 573 1/2 579 605 1/4
23587 3/4 593 1/2 599 1/4 605 632 1/2
24613 619 625 631 659 3/4
Allowance7"7"7"7"5 3/4"

Flat inches sizes (2″ side slack each end)

Size (m)→0.4570.4830.5080.5330.5590.584
Size (")→181920212223
Seats↓
10.5590.5840.6100.6350.6600.686
21.0161.0671.1181.1681.2191.270
31.4731.5491.6261.7021.7781.854
41.9302.0322.1342.2352.3372.438
52.3882.5152.6422.7692.8963.023
62.8452.9973.1503.3023.4543.607
73.3023.4803.6583.8354.0134.191
83.7593.9624.1664.3694.5724.775
94.2164.4454.6744.9025.1315.359
104.6744.9285.1825.4365.6905.944
115.1315.4105.6905.9696.2486.528
125.5885.8936.1986.5026.8077.112
136.0456.3756.7067.0367.3667.696
146.5026.8587.2147.5697.9258.280
156.9607.3417.7228.1038.4848.865
167.4177.8238.2308.6369.0429.449
177.8748.3068.7389.1699.60110.033
188.3318.7889.2469.70310.16010.617
198.7889.2719.75410.23610.71911.201
209.2469.75410.26210.77011.27811.786
219.70310.23610.77011.30311.83612.370
2210.16010.71911.27811.83612.39512.954
2310.61711.20111.78612.37012.95413.538
2411.07411.68412.29412.90313.51314.122
Allowance4"0.102meterstotal

1/16″ sizes (2″ side slack each end)

Size (m)→0.5000.5250.5510.575
Size (")→19 11/1620 11/1621 11/1622 5/8
Seats↓
10.6020.6270.6520.676
21.1021.1531.2031.251
31.6021.6781.7541.826
42.1022.2032.3052.400
52.6022.7292.8562.975
63.1023.2543.4073.550
73.6023.7803.9584.124
84.1024.3054.5094.699
94.6024.8315.0595.274
105.1025.3565.6105.848
115.6025.8826.1616.423
126.1026.4076.7126.998
136.6026.9337.2637.572
147.1027.4587.8148.147
157.6037.9848.3658.722
168.1038.5098.9159.296
178.6039.0349.4669.871
189.1039.56010.01710.446
199.60310.08510.56811.020
2010.10310.61111.11911.595
2110.60311.13611.67012.170
2211.10311.66212.22112.744
2311.60312.18712.77113.319
2412.10312.71313.32213.894
Allowance4"0.102meterstotal

1/8″ sizes (2 1/2″ side slack each end)

Size (m)→0.4860.5110.5370.5620.5870.613
Size (")→19 1/820 1/821 1/822 1/823 1/824 1/8
Seats↓
10.6130.6380.6640.6890.7140.740
21.0991.1491.2001.2511.3021.353
31.5841.6611.7371.8131.8891.965
42.0702.1722.2732.3752.4772.578
52.5562.6832.8102.9373.0643.191
63.0423.1943.3463.4993.6513.804
73.5273.7053.8834.0614.2394.416
84.0134.2164.4204.6234.8265.029
94.4994.7284.9565.1855.4135.642
104.9855.2395.4935.7476.0016.255
115.4715.7506.0296.3096.5886.868
125.9566.2616.5666.8717.1767.480
136.4426.7727.1027.4337.7638.093
146.9287.2837.6397.9958.3508.706
157.4147.7958.1768.5578.9389.319
167.8998.3068.7129.1199.5259.931
178.3858.8179.2499.68110.11210.544
188.8719.3289.78510.24310.70011.157
199.3579.83910.32210.80511.28711.770
209.84310.35110.85911.36711.87512.383
2110.32810.86211.39511.92812.46212.995
2210.81411.37311.93212.49013.04913.608
2311.30011.88412.46813.05213.63714.221
2411.78612.39513.00513.61414.22414.834
Allowance5"0.127meterstotal

1/8″ sizes (3″ side slack each end)

Size (m)→0.4860.5110.5370.5620.5870.613
Size (")→19 1/820 1/821 1/822 1/823 1/824 1/8
Seats↓
10.6380.6640.6890.7140.7400.765
21.1241.1751.2261.2761.3271.378
31.6101.6861.7621.8381.9151.991
42.0962.1972.2992.4002.5022.604
52.5812.7082.8352.9623.0893.216
63.0673.2193.3723.5243.6773.829
73.5533.7313.9084.0864.2644.442
84.0394.2424.4454.6484.8515.055
94.5244.7534.9825.2105.4395.667
105.0105.2645.5185.7726.0266.280
115.4965.7756.0556.3346.6146.893
125.9826.2876.5916.8967.2017.506
136.4676.7987.1287.4587.7888.118
146.9537.3097.6648.0208.3768.731
157.4397.8208.2018.5828.9639.344
167.9258.3318.7389.1449.5509.957
178.4118.8429.2749.70610.13810.570
188.8969.3549.81110.26810.72511.182
199.3829.86510.34710.83011.31311.795
209.86810.37610.88411.39211.90012.408
2110.35410.88711.42011.95412.48713.021
2210.83911.39811.95712.51613.07513.633
2311.32511.90912.49413.07813.66214.246
2411.81112.42113.03013.64014.24914.859
Allowance6"0.152meterstotal

1/4″ sizes (2″ side slack each end)

Size (m)→0.4890.5140.5400.565
Size (")→19 1/420 1/421 1/422 1/4
Seats↓
10.5910.6160.6410.667
21.0801.1301.1811.232
31.5681.6451.7211.797
42.0572.1592.2612.362
52.5462.6732.8002.927
63.0353.1883.3403.493
73.5243.7023.8804.058
84.0134.2164.4204.623
94.5024.7314.9595.188
104.9915.2455.4995.753
115.4805.7596.0396.318
125.9696.2746.5796.883
136.4586.7887.1187.449
146.9477.3037.6588.014
157.4367.8178.1988.579
167.9258.3318.7389.144
178.4148.8469.2779.709
188.9039.3609.81710.274
199.3929.87410.35710.839
209.88110.38910.89711.405
2110.37010.90311.43611.970
2210.85911.41711.97612.535
2311.34711.93212.51613.100
2411.83612.44613.05613.665
Allowance4"0.102meters

1/4″ step sizes 21 to 22 1/4″ (3″ side slack each end)

Size (m)→0.5330.5400.5460.5520.5590.565
Size (")→2121 1/421 1/221 3/42222 1/4
Seats↓
10.6860.6920.6990.7050.7110.718
21.2191.2321.2451.2571.2701.283
31.7531.7721.7911.8101.8291.848
42.2862.3112.3372.3622.3882.413
52.8192.8512.8832.9152.9462.978
63.3533.3913.4293.4673.5053.543
73.8863.9313.9754.0204.0644.108
84.4204.4704.5214.5724.6234.674
94.9535.0105.0675.1245.1825.239
105.4865.5505.6135.6775.7405.804
116.0206.0906.1606.2296.2996.369
126.5536.6296.7066.7826.8586.934
137.0877.1697.2527.3347.4177.499
147.6207.7097.7987.8877.9768.065
158.1538.2498.3448.4398.5348.630
168.6878.7888.8908.9929.0939.195
179.2209.3289.4369.5449.6529.760
189.7549.8689.98210.09710.21110.325
1910.28710.40810.52810.64910.77010.890
2010.82010.94711.07411.20111.32811.455
2111.35411.48711.62111.75411.88712.021
2211.88712.02712.16712.30612.44612.586
2312.42112.56712.71312.85913.00513.151
2412.95413.10613.25913.41113.56413.716
Allowance6"0.152meterstotal

1/4″ step sizes 22 1/2″ to 23 3/4″ (3″ side slack each end)

Size (m)→0.5720.5780.5840.5910.5970.603
Size (")→22 1/222 3/42323 1/423 1/223 3/4
Seats↓
10.7240.7300.7370.7430.7490.756
21.2951.3081.3211.3341.3461.359
31.8671.8861.9051.9241.9431.962
42.4382.4642.4892.5152.5402.565
53.0103.0423.0733.1053.1373.169
63.5813.6203.6583.6963.7343.772
74.1534.1974.2424.2864.3314.375
84.7244.7754.8264.8774.9284.978
95.2965.3535.4105.4675.5255.582
105.8675.9315.9946.0586.1216.185
116.4396.5096.5796.6486.7186.788
127.0107.0877.1637.2397.3157.391
137.5827.6647.7477.8307.9127.995
148.1538.2428.3318.4208.5098.598
158.7258.8208.9159.0119.1069.201
169.2969.3989.5009.6019.7039.804
179.8689.97610.08410.19210.30010.408
1810.43910.55410.66810.78210.89711.011
1911.01111.13211.25211.37311.49411.614
2011.58211.70911.83611.96312.09012.217
2112.15412.28712.42112.55412.68712.821
2212.72512.86513.00513.14513.28413.424
2313.29713.44313.58913.73513.88114.027
2413.86814.02114.17314.32614.47814.630
Allowance6"0.152meterstotal

1/4″ step sizes 24″ to 25″ (3″ and 3 1/2″ side slack each end)

Size (m)→0.6100.6100.6160.6220.6290.635
Size (")→242424 1/424 1/224 3/425
Seats↓
10.7620.7870.7940.8000.8060.813
21.3721.3971.4101.4221.4351.448
31.9812.0072.0262.0452.0642.083
42.5912.6162.6422.6672.6922.718
53.2003.2263.2583.2893.3213.353
63.8103.8353.8743.9123.9503.988
74.4204.4454.4894.5344.5784.623
85.0295.0555.1055.1565.2075.258
95.6395.6645.7215.7795.8365.893
106.2486.2746.3376.4016.4646.528
116.8586.8836.9537.0237.0937.163
127.4687.4937.5697.6457.7227.798
138.0778.1038.1858.2688.3508.433
148.6878.7128.8018.8908.9799.068
159.2969.3229.4179.5129.6089.703
169.9069.93110.03310.13510.23610.338
1710.51610.54110.64910.75710.86510.973
1811.12511.15111.26511.37911.49411.608
1911.73511.76011.88112.00212.12212.243
2012.34412.37012.49712.62412.75112.878
2112.95412.97913.11313.24613.37913.513
2213.56413.58913.72913.86814.00814.148
2314.17314.19914.34514.49114.63714.783
2414.78314.80814.96115.11315.26515.418
Inches slack677777
Meters slack0.1520.1780.1780.1780.1780.178

1/4″ step sizes 25 1/4″ to 27 1/4″ (3 1/2″ and 2 7/8″ side slack each end)

Size (m)→0.6410.6480.6540.6600.692
Size (")→25 1/425 1/225 3/42627 1/4
Seats↓
10.8190.8260.8320.8380.838
21.4611.4731.4861.4991.530
32.1022.1212.1402.1592.223
42.7432.7692.7942.8192.915
53.3853.4163.4483.4803.607
64.0264.0644.1024.1404.299
74.6674.7124.7564.8014.991
85.3095.3595.4105.4615.683
95.9506.0076.0646.1216.375
106.5916.6556.7186.7827.068
117.2337.3037.3727.4427.760
127.8747.9508.0268.1038.452
138.5158.5988.6808.7639.144
149.1579.2469.3359.4239.836
159.7989.8939.98910.08410.528
1610.43910.54110.64310.74411.220
1711.08111.18911.29711.40511.913
1811.72211.83611.95112.06512.605
1912.36312.48412.60512.72513.297
2013.00513.13213.25913.38613.989
2113.64613.78013.91314.04614.681
2214.28814.42714.56714.70715.373
2314.92915.07515.22115.36716.066
2415.57015.72315.87516.02716.758
Inches slack77775 3/4
Meters slack0.1780.1780.1780.1780.146

Parameters

  • Side slack: Extra space between the end standard of the row and the end of available space, given for drilling and assemble purposes.
  • Size: Spacing between chairs’ standards.
  • Seats: Seats quantity in row.
  • Allowance: It is the sum of side slack on both sides of the row.

These charts are giving the required space for a row according to seats size and required quantity.