Rebar Weight Calculator
Estimate reinforcement weight, full stock bars, ordered length and cost from total installed length, bar diameter, waste and editable steel price.
Default project preview
442 lb
Stock bars
33
Ordered bar length
660 ft
Purchased length
660 ft
Unit bar weight
0.669 lb/ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Total installed bar length
Enter this project assumption in ft. The current imperial default is 600 ft.
Bar diameter
Enter this project assumption in in. The current imperial default is 0.5 in.
Lap and cut allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 60.
Stock bar length
Enter this project assumption in ft. The current imperial default is 20 ft.
Steel price
Enter this project assumption in per lb. The current imperial default is 0.85 per lb. Minimum: 0.
How to read the outputs
Stock bars
20 ft each. Default preview: 33.
Ordered bar length
allowance included. Default preview: 660 ft.
Purchased length
full stock bars. Default preview: 660 ft.
Unit bar weight
diameter-based estimate. Default preview: 0.669 lb/ft.
Bar diameter
entered diameter. Default preview: 0.5 in.
Steel cost
entered weight rate. Default preview: $375.32.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Metric unit weight ≈ diameter² ÷ 162 kg/m. Ordered length = installed length × allowance factor. Total weight = ordered length × unit weight, and stock bars are rounded up.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Rebar Weight Calculator questions
Why does rebar diameter change weight so quickly?+
Weight is proportional to the square of diameter, so modest diameter increases add substantial steel mass.
Are bends and hooks included?+
Only through the entered total installed length and allowance. Detailed bar schedules should include every bend and hook.
Does the calculator select the required rebar?+
No. Bar size, spacing and grade require structural design.