Rebar Weight Table: Total weight by Bar diameter
Reference table of total weight for Rebar Weight across a range of bar diameter values — exact, engine-computed figures you can read off at a glance.
Rebar Weight Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Total weight
88.89
- Weight per metre
- 0.889
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Rebar Weight Calculator
The Rebar Weight Calculator works out your total weight, along with 1 related figure in an instant. Enter bar diameter and total length and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the bar diameter.
- Enter the total length.
- Read off your total weight, together with weight per metre — the calculator updates automatically, with no button to press.
Formula
The Rebar Weight Calculator uses the formula:
Total weight = Bar diameter × Bar diameter ÷ 162 × Total length
Worked example
For example, with bar diameter of 12 mm and total length of 100 m, the total weight is 88.89.
| Bar diameter | 12 mm |
|---|---|
| Total length | 100 m |
| Total weight | 88.89 |
|---|---|
| Weight per metre | 0.889 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Diameter
- The distance across a circle through its centre — twice the radius.
Frequently asked questions
Use weight per metre = diameter² ÷ 162 (mm and kg/m), then multiply by length. 100 m of 12 mm bar weighs about 88.9 kg.
It comes from steel's density applied to a round bar, giving the handy d²/162 rule for kilograms per metre.
About 1.58 kg per metre, since 16² ÷ 162 is roughly 1.58.
Steel is sold and costed by weight, so this helps with ordering and budgeting.
Enter the bar diameter. Enter the total length. Read off your total weight, together with weight per metre — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Rebar Weight: Formula, Steps & Examples
Learn how to calculate Rebar Weight — the formula explained step by step, with worked examples and a free calculator to check your answer.