Metal Weight Calculator
Instantly calculate the weight of any metal shape — round bars, pipes, sheets, plates, angles, channels — in stainless steel, mild steel, aluminium, brass, copper, bronze, titanium, and more. Built for engineers, fabricators, and procurement teams.
Specifications
Calculated Weight
Theoretical weight only. Actual mill weight may vary ±1–3% due to tolerances.
Shape-specific weight calculators
Quick links to dedicated calculators for each shape — pick a material on the next page (SS, MS, aluminium, brass, copper, and more).
How the metal weight calculator works
The weight of a metal product depends on three things: its shape (which determines the cross-sectional area), its length or area, and the density of the material. For a solid round bar the formula is π × radius² × length × density. For pipes we subtract the inner volume. For sheets and plates we calculate length × width × thickness × density. This calculator handles all 17 standard shapes used in the Indian metal trade and applies the correct density multiplier for each material.
Material density reference
Stainless steel (7.93 g/cc) is the baseline. We multiply by these factors for other materials:
- Mild Steel / Carbon Steel / Tool Steel — 1.000× (≈ 7.85 g/cc)
- Brass — 1.073× (≈ 8.50 g/cc)
- Copper — 1.135× (≈ 8.96 g/cc)
- Bronze — 1.139× (≈ 8.80 g/cc)
- Aluminium — 0.349× (≈ 2.70 g/cc)
- Titanium — 0.600× (≈ 4.51 g/cc)
- Nickel Alloys — 1.120× (≈ 8.90 g/cc)
Frequently asked questions
How is the weight of a metal product calculated?
Metal weight is calculated using the volume of the shape (length × cross-sectional area) multiplied by the density of the material. Different shapes use different formulas — e.g., for round bars: π × r² × length × density. We then apply a material density multiplier so you get accurate weights for stainless steel, mild steel, brass, copper, aluminium, and other alloys.
What is the density of stainless steel used for these calculations?
We use 7.93 g/cc for stainless steel (304/316 grades) as the baseline. For other materials we apply a density multiplier — for example brass is 1.073× SS, copper is 1.135×, aluminium is 0.349×, bronze 1.139×, and titanium 0.60×.
Why is my calculated weight slightly different from the supplier weight?
Theoretical weight calculations use ideal density values. Actual delivered weight can vary by ±1–3% due to manufacturing tolerances, surface finish, and exact alloy composition. MetaleMart buyer ratings include a "Weight Accuracy" score for each seller so you can see who consistently delivers close to theoretical weight.
Can I calculate the weight of a custom-cut piece?
Yes — enter the exact dimensions you need (length, width, thickness, diameter) and select the material. The calculator gives you per-piece weight, total weight for your quantity, and total length so you can plan procurement and freight accurately.
Does the weight include any allowance for cutting or wastage?
No. The calculator returns net theoretical weight only. If your supplier is cutting from stock lengths, ask for a cutting allowance (typically 0.5–2%). Plates and sheets cut to size usually have no wastage allowance.
How accurate are the formulas for hollow sections like pipes and tubes?
For hollow sections we calculate the wall area (outer area minus inner area) × length × density, with a 1.5% mill tolerance factor. For ERW and seamless pipes we use the standard formula (OD − thickness) × thickness × 0.0247 × material multiplier, which is the industry standard used by ISMC, IS 1239, and ASTM standards.
Is this calculator free to use?
Yes — completely free, no signup required. You can use it as many times as you like for any project, large or small. We built it as a service to the metal industry to make procurement planning easier and more accurate.
Can I find suppliers for the size I just calculated?
Yes — once you calculate the weight, click the "Find this on MetaleMart" button to see live listings from verified sellers across India for that exact shape, material, and grade. You can compare rates per kg, MOQ, bulk discount tiers, and delivery pincodes.