General Rebar Weight & Length Converter
Convert rebar lengths to tonnage with a multi-diameter cart. Supports metric and imperial sizes for accurate truckload estimation.
Add Rebar to List
| Dia | Length | Qty | Subtotal (kg) | Action |
|---|
About
Ordering reinforcement steel requires converting linear takeoff measurements into weight (tonnage), as steel is priced and shipped by mass. This utility acts as a 'Material Cart' for site engineers and purchasing agents. Instead of calculating one bar size at a time, you can build a comprehensive list of various diameters—from thin 6mm stirrup wire to massive 40mm foundation bars—and get an instant total tonnage.
This tool eliminates the need to manually reference weight tables and sum up calculator results, reducing the risk of arithmetic errors that could lead to ordering short or overspending on logistics.
Formulas
The calculator uses the standard density of steel (ρ ≈ 7850 kg/m³) derived into linear weight factors:
Where Wfactor for a specific diameter d (in mm) is approximately:
Reference Data
| Metric Size | Imperial Size | Weight (kg/m) | Weight (lb/ft) |
|---|---|---|---|
| 6 mm | #2 (approx) | 0.222 | 0.149 |
| 8 mm | - | 0.395 | 0.265 |
| 10 mm | #3 | 0.617 | 0.414 |
| 12 mm | #4 | 0.888 | 0.597 |
| 16 mm | #5 | 1.580 | 1.062 |
| 20 mm | #6 | 2.466 | 1.657 |
| 25 mm | #8 | 3.853 | 2.589 |
| 32 mm | #10 | 6.313 | 4.242 |
| 40 mm | #12 (approx) | 9.865 | 6.629 |