Calculating your total weight is straightforward once you know the Rebar Weight formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Rebar Weight Calculator.
What is Rebar Weight?
The Rebar Weight calculation tells you your total weight from a few simple inputs. The figure you are solving for here is the total weight.
The Rebar Weight formula
The core formula is:
Total weight = Bar diameter × Bar diameter ÷ 162 × Total lengthHere is what each input means:
- Bar diameter — a value measured in mm. Example: 12 mm.
- Total length — a value measured in m. Example: 100 m.
How to calculate it step by step
- Write down the bar diameter (for example, 12 mm).
- Write down the total length (for example, 100 m).
- Apply the formula above to get your total weight.
- Double-check the result with the Rebar Weight Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Bar diameter | 12 mm |
| Total length | 100 m |
| Total weight | 88.89 |
| Weight per metre | 0.889 |
With bar diameter of 12 mm and total length of 100 m, the total weight works out to 88.89.
Example 2
With bar diameter of 24 mm and total length of 100 m, the total weight works out to 355.56.
| Result | Value |
|---|---|
| Total weight | 355.56 |
| Weight per metre | 3.556 |
Example 3
With bar diameter of 6 mm and total length of 100 m, the total weight works out to 22.22.
| Result | Value |
|---|---|
| Total weight | 22.22 |
| Weight per metre | 0.222 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Rebar Weight Calculator does it instantly, for free, with the formula and a worked example built in.
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