Rebar weight calculator

Multiply total reinforcing-bar length by the supplier’s mass per metre.

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Total bar length (m)

Bar mass per metre (kg/m)

Answer

…

Multiply total reinforcing-bar length by the supplier’s mass per metre.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Mass = length × linear mass. The default is only an arithmetic example, not a bar specification. Enter the actual supplier value for your bar; diameter alone does not identify every product.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Rebar weight calculator

Multiply total reinforcing-bar length by the supplier’s mass per metre.

Mass = length × linear mass. The default is only an arithmetic example, not a bar specification. Enter the actual supplier value for your bar; diameter alone does not identify every product.

Next: Rebar material calculator

A worked example

Example inputs: total bar length (m) = 10, bar mass per metre (kg/m) = 0.888. Total mass = 8.88.

Before you use the result

Mass = length × linear mass. The default is only an arithmetic example, not a bar specification. Enter the actual supplier value for your bar; diameter alone does not identify every product.

Example results for total bar length (m)

These examples use Bar mass per metre (kg/m): 0.888. They are reference calculations, not recommended settings.

Total bar length (m)	Total mass
5	4.44
10	8.88
20	17.76

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