Rebar mass
Rebar mass: use bar diameter, total bar length, material density. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Mass = π(diameter/1000)²/4 × length × density
Variables & units
- Bar diameter
- mm · minimum 0, maximum 1000000000000
- Total bar length
- m · minimum 0, maximum 1000000000000
- Material density
- kg/m³ · minimum 0.000001, maximum 1000000000000
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Smooth-cylinder geometric estimate; nominal bar dimensions and actual manufacturing tolerances may differ.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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