Rebar Weight Calculator
Calculate the total weight of reinforcement bars (rebar) by size, length, and quantity.
Supports metric and imperial bar sizes.
Total Rebar Weight
Rebar weight is calculated from the bar size (which determines weight per unit length), total length, and quantity.
Total Weight = Weight per meter (or foot) × Length × Quantity
Metric rebar sizes (weight per meter):
| Bar Size | Diameter (mm) | kg/m |
|---|---|---|
| 6 mm | 6 | 0.222 |
| 8 mm | 8 | 0.395 |
| 10 mm | 10 | 0.617 |
| 12 mm | 12 | 0.888 |
| 16 mm | 16 | 1.579 |
| 20 mm | 20 | 2.466 |
| 25 mm | 25 | 3.854 |
| 32 mm | 32 | 6.313 |
Imperial rebar sizes (weight per foot):
| Bar # | Diameter (in) | lbs/ft |
|---|---|---|
| #3 | 0.375 | 0.376 |
| #4 | 0.500 | 0.668 |
| #5 | 0.625 | 1.043 |
| #6 | 0.750 | 1.502 |
| #7 | 0.875 | 2.044 |
| #8 | 1.000 | 2.670 |
Quick metric formula:
Weight (kg/m) = Diameter (mm)² / 162