🔩 TMT bar weight calculator — kg per metre and MT
Convert bar diameter and length into weight, or convert a tonnage into the number of bars. Uses the standard formula (diameter² ÷ 162) for kg per metre, with a weight chart for all common diameters.
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How much does a 12 mm TMT bar weigh?
About 0.889 kg per metre, so a 12 m bar weighs roughly 10.7 kg and one tonne has about 94 bars.
What is the formula for TMT bar weight?
Weight in kg per metre = diameter in mm squared ÷ 162. Multiply by the length in metres for total weight.
Is the calculated weight the same as the delivered weight?
Theoretical weight is close but mills have a permitted tolerance. Always confirm with the weighbridge slip on delivery.