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Steel Bar Weight Calculator
Calculate TMT / rebar weight per metre and total weight with the D²/162 formula for 6–32 mm bars. Includes a unit-weight table.
Steel Bar Weight Calculator
Total steel weight0.889 kg/m × 12 m × 10 bars
| Diameter | kg/m | kg per 12 m bar |
|---|---|---|
| 6 mm | 0.222 | 2.67 |
| 8 mm | 0.395 | 4.74 |
| 10 mm | 0.617 | 7.41 |
| 12 mm | 0.889 | 10.67 |
| 16 mm | 1.58 | 18.96 |
| 20 mm | 2.469 | 29.63 |
| 25 mm | 3.858 | 46.3 |
| 32 mm | 6.321 | 75.85 |
D²/162 is the standard shortcut for steel (density 7,850 kg/m³). Allow 3–5% for laps and wastage.
Planning estimates only. Building codes, loads and material specs vary — have a licensed engineer or contractor confirm quantities and safety requirements. Disclaimer
Important
Quantity estimates for planning and ordering. Structural members, reinforcement and footings must be designed by a qualified engineer to local code.
Frequently asked questions
Is my data uploaded?
No. The calculation runs entirely in your browser — nothing you type is sent to a server.
Is it free?
Yes — free, unlimited and no sign-up.