Reinforcing Steel Calculator
Calculate the weight and total length of reinforcing steel bars (rebar) needed for a concrete structure based on bar size, length, and quantity.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Reinforcing Steel Calculator
This calculator estimates the total weight and length of steel reinforcing bars (rebar) based on standard metric sizes. Follow these steps:
- Select Bar Size – Choose a rebar size from the dropdown (e.g., #4 for 13mm diameter). Each size has a fixed weight per meter (kg/m).
- Enter Bar Length – Input the length of each bar in meters (e.g., 6). Use positive numbers only.
- Enter Quantity – Specify the number of bars needed (e.g., 10). Must be a whole positive number.
- Click "Calculate" – The tool will display:
- Total Weight – Combined weight of all bars in kilograms.
- Total Length – Sum of all bar lengths in meters.
- Weight per Bar – Weight of a single bar.
Note: All inputs are metric. The formula used is: Weight = Weight per meter × Length × Quantity. If you see an error, check that your inputs are valid positive numbers.
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Frequently Asked Questions
It computes the total weight and length of rebar needed based on bar size, length, and quantity.
Weight = weight per meter (depends on bar size) × length × quantity.
Common US sizes #3 to #18 with corresponding metric diameters and weight per meter.