Find out how many standard-length TMT (Thermo-Mechanically Treated) steel bars you need to order for a given total steel weight requirement.
How to Use the TMT Bar Calculator
Enter the "Total Steel Weight Required (kg)" - use the RCC Calculator to work this out from your structural element.
Enter your chosen "TMT Bar Diameter (mm)".
Enter the "Standard Bar Length (m)" your supplier sells - usually 12m.
Click "Calculate Bars Needed" to see how many bars to order.
Frequently Asked Questions
The Steel Weight Calculator works forward - from a known diameter, length, and quantity of bars, it gives you the total weight. This TMT Bar Calculator works backward - from a known total weight requirement, it tells you how many standard bars to order.
Bars are sold as whole units, so the calculator rounds up to ensure you order enough steel to meet your weight requirement, even if the exact requirement falls partway through the last bar.
Yes - most RCC structures use different bar diameters for main reinforcement versus stirrups/distribution bars. Run this calculator separately for each diameter and its corresponding share of the total steel weight.
Yes, it's completely free and requires no sign-up.