Steel Bar Weight Chart & Calculator Guide
Steel bar weight is about diameter² ÷ 162 kg/m (e.g. a 12 mm bar ≈ 0.89 kg/m). Total weight = weight/m × length, plus 3–5% for cut-offs and waste.
Steel bar weight depends on diameter and density. Use this guide and the built-in calculator to estimate rebar quantities quickly.
Weight Per Meter Formula
The approximate weight of a steel bar per meter is (diameter² / 162) in kg/m for metric bars — use the steel weight calculator for instant results. For example, a 12mm bar weighs about 0.89 kg/m. Multiply by the total length to get the full weight.
Standard Bar Sizes
Common rebar sizes in metric construction are 8mm, 10mm, 12mm, 16mm, 20mm, and 25mm. Each size has a different weight per meter and bending radius. Always check project specs for required bar size and spacing.
Estimating Total Rebar Weight
List each bar size and length in your reinforcement schedule. Multiply the weight per meter by the total length for each size, then sum all sizes. Add 3–5% for cut-offs and waste.
FAQ
- How much does a 12mm steel bar weigh per meter?
- Approximately 0.89 kg/m.
- What is the formula for steel bar weight?
- Weight per meter ≈ diameter² / 162 (for metric bars).
- Should I add wastage for rebar?
- Yes, add 3–5% for cut-offs, bends, and mistakes.
- Can I use this for stainless steel?
- The formula is similar, but stainless steel is slightly lighter. Check manufacturer data for exact weight.