Metal Weight Calculator
Calculate the weight of sheet, round bar, square bar and equal-leg angle in steel, aluminum, copper or brass — by geometry and material density.
Sheet, round, square or angle
Steel, aluminum, copper or brass
Sheet width in millimeters
Sheet length in millimeters
Sheet thickness in millimeters
Metal weight
31,4 kg
Density 7850 kg/m³
Metal volume
4 L
0,004 m³
Calculation formula
Weight = Volume × Material density
Volume is computed from the profile geometry: sheet — width × length × thickness, round — π × (d/2)² × L, square — a² × L, angle — (2 × b × t − t²) × L. Density: steel 7850 kg/m³, aluminum 2700, copper 8960, brass 8500.
About the Metal Weight Calculator
The metal weight calculator computes the theoretical mass of a sheet, round bar, square bar or equal-leg angle from the profile geometry and the material density. Pick the profile and material, enter dimensions in millimeters and meters — and get the weight in kilograms and the volume in liters.
It is handy for builders, machinists and metal workers: estimate how much a roofing sheet will weigh on a delivery van, what an angle weighs for a carport frame, or how heavy a round billet is before turning on a lathe. Carbon and stainless steel (7850), aluminum (2700), copper (8960) and brass (8500) are supported.
All math runs locally in your browser — no data leaves your device, no signup required. Use the calculator for free, with no limits on the number of calculations.
Calculator benefits
Four profiles in one tool
Sheet, round, square and angle — switch between profiles without leaving the page.
Four materials
Steel, aluminum, copper and brass with built-in densities — no need to keep a reference book at hand.
Weight and volume
Besides the mass in kilograms, the calculator shows the metal volume in liters and m³ — handy for ordering and logistics.
Frequently asked questions
How does the density of carbon and stainless steel differ?
Carbon (mild) steel has a density of 7850 kg/m³, while stainless chromium-nickel steels (AISI 304, 316) sit around 7900–7930 kg/m³. The difference is below 1%, so for everyday calculations the calculator uses a single value of 7850 — the error stays within the rolled-product tolerance.
How is the weight of an angle calculated?
The cross-section area of an equal-leg angle equals S = 2 × b × t − t², where b is the leg length and t is the wall thickness (both in mm). Multiply by length in meters and material density to get kilograms. For example, a 50×5 angle that is 6 m long weighs about 22.7 kg in steel.
What is the specific weight of steel 7850?
The specific weight of steel is 7850 kg/m³ (or 7.85 g/cm³) — the standard reference value for carbon structural steels per GOST and EN. It is used when computing the mass of rolled products: sheet, round, square, angle, channel and beam. Stainless and tool grades differ by 1–2%.
How accurate is the result?
The calculator computes the theoretical mass from nominal dimensions and reference density. The real weight can deviate by 2–5% due to thickness tolerance, angle chamfers and rolling unevenness. For large orders, verify the weight against the mill certificate.
Which profile should I pick?
Sheet — for flat-rolled products (hot-rolled, cold-rolled, galvanized). Round — for round bar, smooth rebar, shafts. Square — for square bar and bus bars. Angle — for equal-leg angles per GOST 8509 / EN 10056.
Which units do I use?
Cross-section dimensions are in millimeters (sheet width, round diameter, square side, angle leg and thickness); the length of the rolled product is in meters. Sheet thickness is also in mm. The calculator converts everything to SI and returns the weight in kilograms.