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  • 1/B, Ground Floor, Siddhi Apartment,
    10th Khetwadi Back Road, Mumbai 400 004

Bolt Weight Calculator

Bolt Weight Calculator
  • Imperial Sizes : 1/2" to 6"
  • Material : Ferrous and Non Ferrous Metals
  • Types : Hex, U, Flange, Socket, Countersunk, Shoulder
  • Length : 3 MM To 200 MM
  • Uses : Waste Water Treatment
  • Thread : Full or Partial Thread (Customizable)
  • Sizes Can Be Manufacture : Up to M180
  • Corrosion : Excellent Resistance to Corrosion
  • Sample : Free Sample Can Be Sent For Test
  • Perfect for : Extreme Weather Conditions
  • Testing : Proof Load Testing
  • Steel Type : Austenitic

Find Fastener Weight Calculator in lbs Here



Table Of Content


astm bolt standards

astm bolt standards

astm bolt standards



iso bolt standards

iso bolt standards

iso bolt standards



Metric Bolt DIN Standards

Metric Bolt DIN Standards

Metric Bolt DIN Standards


Bolt Weight Calculator

Refer Anchor Bolt Weight Calculation Formula

Bolt Weight Calculation Formula

Bolt Diam Head Size
Heavy Hex Bolt Hex Bolt, Lag Bolt, Square Bolt
#8 - 1/4"
#12 - 5/16"
5/16" - 1/2"
7/16" - 5/8"
9/16" - 13/16"
3/4" 1-1/4" 1-1/8"
1" 1-5/8" 1-1/2"
1-1/4" 2" 1-7/8"
#6 - 1/4"
#10 - 5/16"
1/4" - 7/16" or 3/8"
3/8" - 9/16"
1/2" 7/8" 3/4"
5/8" 1-1/16" 15/16"
7/8" 1-7/16" 1-5/16"
1-1/8" 1-3/4" 1-11/16"

How to Calculate Bolt Head Diameter ?

How to Calculate Bolt Head Diameter ?

Bolt Size to Wrench Size Chart

Bolt Size Wrench Size
M8 13
M12 19
1/4″ 7/16″
1/2″ 3/4″
M6 10
M10 17
M16 24
3/8″ 9/16″
5/8″ 15/16″

Also View Bolt Head Size Formula and Approx Weight

Bolt Head Size Formula

Bolt Size Wrench Size Head Diam
M8 13 13
M12 19 19
M6 10 10
M10 17 17
M16 24 24

  • ISO 4014
  • DIN 933

Structural Bolt Weight Chart

Length Diameter
5/8" 1/2" 7/8" 3/4" 1 1/8" 1" 1 3/8” 1 1/4" 1 1/2”
11/4 31.3 17.8 74.4 49.6 - 104 - - -
1 29.4 16.5 - 47 - - - - -
13/4 35.3 20.5 81.9 55.3 154 114 261 205 333
11/2 33.1 19.2 78 52.2 148 109 - 197 -
21/4 39.8 23.3 90.3 61.6 167 124 279 220 355
2 37.4 21.9 86.1 58.4 160 119 270 212 344
23/4 43.9 26.1 98.8 67.8 181 135 300 237 379
21/2 41.7 24.7 94.6 64.7 174 130 290 229 366
31/4 48.2 28.8 107 74 195 146 321 255 403
3 46.1 27.4 103 70.9 188 141 310 246 391
33/4 52.5 31.6 116 80.2 209 157 342 272 428
31/2 50.4 30.2 111 77.1 202 151 332 263 416
41/4 56.9 34.3 124 86.4 223 168 363 289 453
4 54.7 33 120 83.3 216 162 353 280 441
43/4 61.2 37.1 133 92.7 237 179 384 306 478
41/2 59 35.7 128 89.5 230 173 374 298 465
51/4 65.5 39.9 141 98.9 251 190 405 324 503
5 63.3 38.5 137 95.8 244 184 395 315 490
53/4 69.8 42.6 150 105 265 201 426 341 527
51/2 67.7 41.2 146 102 258 196 416 332 515
61/4 74.1 - 158 111 279 212 447 358 552
6 71.9 44 154 108 272 207 437 349 540
63/4 78.5 - 167 118 293 223 468 375 577
7 80.6 - 171 121 300 229 479 384 589
61/2 76.3 - 163 114 286 218 458 367 565
71/2 84.9 - 179 127 314 240 500 401 614
71/4 82.8 - 175 124 307 234 489 392 602
8 89.2 - 187 133 328 251 521 418 639
81/4 - - 192 - 335 257 531 427 651
73/4 87.1 - 183 130 321 246 510 410 626
83/4 - - - - - - 552 444 676
81/2 - - 196 - 342 262 542 435 664
Per inch 8.6 5.5 16.9 12.4 28 22.1 42.5 34.4 49.7
9 - - - - - - 563 453 689
F436 Round Washers 3.6 2.1 7 4.8 11.3 9.4 16.8 13.8 20

How to Choose the Right Steel Bolt Head Size ?

  • For Space Limited Designs
  • For High Torque Applications
  • For Structural Applications

Anchor Bolt Weight Calculator

Metric English
Diam mm Length mm Weight kgs Diam in Length ft Weight lbs
16 1500 2.37 0.62992 4.92125 5.22
10 1500 0.92 0.3937 4.92125 2.04
20 1500 3.7 0.7874 4.92125 8.16
12 1500 1.33 0.47244 4.92125 2.94
Total 8.32 Total 18.35