Steel Weight Calculator
Calculate the total weight and cost of reinforcement steel bars from their diameter and length.
Estimates only — not professional financial, medical, legal or engineering advice. Read full disclaimer.
Calculating...
Result
Fill in the form and click Calculate to see your result here.
How it's calculated
Unit weight per meter (kg/m) = diameter² ÷ 162. Total weight = unit weight × total bar length × number of bars, with a wastage percentage added for cutting losses.
Example
Example: Steel Weight Calculator
Inputs
- Bar Diameter: 12
- Bar Length: 12
- Number Of Bars: 1
- Wastage Percent: 3
- Rate Per Kg: 0
Outputs
- Unit Weight Per Meter: 0.8889
- Total Weight: 10.99
- Estimated Cost: 0
This example uses typical sample values. Adjust the inputs above to see how the results change for your own numbers.
About this calculator
The Steel Weight Calculator converts reinforcement bar diameter and length into total weight using the standard unit-weight formula, then applies a wastage allowance and an optional rate per kg to estimate material cost.
Frequently Asked Questions
The standard formula is weight (kg/m) = diameter² ÷ 162, where diameter is in millimeters. This calculator applies that formula automatically to your bar size and length.
A wastage allowance of 3-5% is typical to account for cutting and lapping losses; the calculator defaults to 3%, which you can adjust for your project.
Yes, enter your rate per kilogram and the calculator will multiply it by the total weight (including wastage) to give you an estimated material cost.
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