TMT Steel Weight Calculator Kg
Steel Weight Calculator
TMT bar weight calculator — dia 8–32 mm, length and nos to total kg using IS formula D²/162.
Your data never leaves your browser — all processing happens locally on your device.
Formula: Weight (kg) = (D² / 162) × Length (m) × Nos — standard IS rule for TMT bars.
About this tool
Calculate TMT reinforcement steel weight for Indian construction using the standard formula: Weight (kg) = (D²/162) × Length (m) × Nos. Add multiple bar diameters (8, 10, 12, 16, 20, 25, 32 mm) — get total kg and tonnage for billing and purchase orders. Free browser calculator for site engineers and rebar supervisors.
How to use the Steel Weight Calculator
- 1
Add bar entries
Select dia (mm), cut length and number of bars.
- 2
Add more sizes
Use Add bar size for mixed reinforcement.
- 3
Review total weight
See kg, tonnes and per-size breakdown.
Frequently Asked Questions
What is the D²/162 formula?
Standard IS rule: weight in kg = (diameter mm)² ÷ 162 × length in metres × number of bars.
Does it work for TMT and HYSD?
Yes — formula is the same for TMT Fe500, Fe550 and plain HYSD bars of same diameter.
Can I mix bar sizes?
Add multiple rows — each diameter and length is summed to total kg.