Weight of steel
Since the formula to be derived is D^2/162 kg/m and D^2/532 kg/ft, assumed cross section is circular and the material is cylinder.
Physical Characteristics of #3 Rebar:
Imperial Bar size: #3
"Soft" metric size: #10
Weight per unit length: 0.376 lb/ft, 0.561 kg/m & 0.171 kg/ft
Nominal diameter: 0.375 inches, 9.525 millimeters
Nominal area: 0.11 square inches, 71 square millimeters
Physical characteristics of #4 Rebar:
Imperial Bar Size: #4
"Soft" Metric Size: #13
Weight per unit length: 0.668 lb/ft, 0.996 kg/m & 0.304 kg/ft
Nominal diameter: 0.5 inches, 12.7 millimeters
Nominal area: 0.2 square inches, 129 square millimeters
Physical Characteristics of #5 Rebar:
Imperial Bar Size: #5
"Soft" Metric Size: #16
Weight per unit length: 1.043 lb/ft, 1.556 kg/m & 0.474 kg/ft
Nominal diameter: 0.625 inches, 15.875 millimeters
Nominal area: 0.31 square inches, 200 square millimeters
Physical Characteristics of #6 Rebar:
Imperial bar size: #6
"Soft" metric size: #19
Weight per unit length: 1.502 lb/ft, 2.24 kg/m & 0.683 kg/ft
Nominal diameter: 0.75 inches, 19.05 millimeters
Nominal area: 0.44 square inches, 284 square millimeters
Physical characteristics of #7 Rebar:
Imperial bar size: #7
"Soft" metric size: #22
Weight per unit length: 2.044 lb/ft 3.049 kg/m & 0.929 kg/ft
Nominal diameter: 0.875 inches, 22.225 millimeters
Nominal area: 0.6 square inches, 387 square millimeters
Physical Characteristics of #8 Rebar:
Imperial Bar size: #8
"Soft" Metric Size: #25
Weight per unit length: 2.67 lb/ft, 3.982 kg/m & 1.214 kg/ft
Nominal diameter: 1.000 inches, 25.4 millimeters
Nominal area: 0.79 square inches, 509 square millimeters
Specifications For #9 Rebar:
Imperial Bar size: #9
Soft size (metric size): 29
Weight per unit length: 3.4 lbs/ft, 5.071 kg/m & 1.546 kg/ft
Nominal diameter: 1.128 inches, 28.65 millimeters
Nominal area: 1 square inch, 645 square millimeters
Physical Specifications of #10 Rebar:
Imperial Bar size: #10
"Soft" Metric Size: #32
Weight per unit length: 4.303 lb/ft, 6.418 kg/m & 1.956 kg/ft
Nominal diameter: 1.27 inches; 32.26 millimeters
Nominal area: 1.27 square inches; 819 square millimeters
Physical Characteristics of #11 Rebar:
Imperial Bar size: #11
"Soft" Metric Size: #36
Weight per unit length: 5.313 lb/ft, 7.924 kg/m & 2.415 kg/ft
Nominal diameter: 1.41 inches, 35.81 millimeters
Nominal area: 1.56 square inches, 1006 square millimeters
Physical Characteristics of #14 Rebar:
Imperial Bar size: #14
"Soft" Metric Size: #43
Weight per unit length: 7.65 lb/ft, 11.41 kg/m & 3.478 kg/ft
Nominal diameter: 1.693 inches, 43 millimeters)
Nominal area: 2.25 square inches ,1452 square millimeters)
Physical Characteristics of #18 Rebar
Imperial Bar size: #18
Metric or "soft size" equivalent: number #57 rebar
Weight per unit length: 13.6 lbs/ft, 20.284 kg/m & 6.183 kg/ft
Nominal diameter: 2.257 inches, 57.33 millimeters
Nominal area: 4 square inches, 2581 square millimeters
Rebar Chart