ASTM Standard Reinforcing Bars
Soft Metric Size Nom Diam mm Area mm2 Weight Factors Imperial Size Nom Diam inches Area in2 Weight Factors
kg/m kg/ft lb/ft lb/m
10 9.5 71 .560 .171 3 .375 .11 .376 1.234
13 12.7 129 .994 .303 4 .500 .20 .668 2.192
16 15.9 199 1.552 .473 5 .625 .31 1.043 3.422
19 19.1 284 2.235 .681 6 .750 .44 1.502 4.928
22 22.2 387 3.042 .927 7 .875 .60 2.044 6.706
25 25.4 510 3.973 1.211 8 1.000 .79 2.670 8.760
29 28.7 645 5.060 1.542 9 1.128 1.00 3.400 11.155
32 32.3 819 6.404 1.952 10 1.270 1.27 4.303 14.117
36 35.8 1006 7.907 2.410 11 1.410 1.56 5.313 17.431
43 43.0 1452 11.384 3.470 14 1.693 2.25 7.650 25.098
57 57.3 2581 20.239 6.169 18 2.257 4.00 13.600 44.619

Comparison of Steel Grades

Soft Metric

Imperial
Grade MPa Psi Grade MPa Psi
300 300 43,511 40 257.79 40,000
420 420 60,716 60 413.69 60,000
520 520 75,420 75 517.11 75,000

Conversion Factors
To Metric To Imperial
1/8 inch = 3.175 mm  
1 inch = 25.4 mm 1 mm = 0.0394 inches
1 foot = 304.8 mm 1 meter = 3.2808 feet
1000 ft2 = 92.903 m2 100 m2 = 1076.39 ft2
1000 ft3 = 28.317 m3 10m3 = 353.14 ft3
1000 gal = 3.7854 m3 10m3 = 2.641.73
1 pound = 0.4536 kg 1 kg = 2.2046 pounds
1 psf = 4.88243 kg/m2 10 kg/m2 = 2.048 psf
1 pcf = 16.019 kg/m3 10 kg/m3 = 0.624 pcf
short ton = 907.18 kg
(2000 lbs.)		 0.90718 = 2000 pounds
tonne
long ton = 1016 kg
(2240 lbs.)		 1 tonne = 2204.6 pounds
1000 psi = 6.8948 MPa 1 MPa = 145.0368 psi

Newton (N) = kg m/s2 = kilograms x 9.80665
Pascal (Pa) = N/m2

 

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