Calculate the weight of metal stock in various shapes: plate, round bar, tube, angle, channel, and I-beam. Supports steel, aluminum, copper, brass, titanium, and more.
The Metal Weight Calculator estimates the weight of metal stock in common shapes including flat plate, round bar, square bar, hexagonal bar, round tube, square tube, and sheet. Select from over 15 common metals and alloys — steel, stainless steel, aluminum, copper, brass, bronze, titanium, lead, zinc, nickel, and more. It is a fast way to translate dimensions into weight before ordering, shipping, or lifting material.
Accurate weight estimation is essential for material procurement, shipping cost calculation, structural engineering, and fabrication planning. A single steel plate 4×8 feet at 1/4" thick weighs about 327 pounds — information critical for lifting plans, truck loading, and cost estimation.
Enter the shape, dimensions, material, and quantity to get instant weight in pounds, kilograms, and metric tons. The calculator also shows volume, surface area, and cost estimate when you enter a price per pound or kilogram. It is a quick check before ordering, shipping, or lifting material.
Use this calculator when you need a fast material-weight estimate for quoting, freight, lifting plans, or stock ordering. It is especially helpful when the shape is simple but the weight consequences are not obvious from dimensions alone, such as plate, bar, or tube stock. That makes it easier to plan handling and cost before the material arrives.
Weight = Volume × Density. Plate: V = Width × Thickness × Length. Round Bar: V = π/4 × D² × L. Tube: V = π/4 × (OD² - ID²) × L. Hex Bar: V = (3√3/2) × S² × L (S = flat-to-flat / √3).
Result: 326.7 lbs (148.2 kg)
A mild steel plate 48" × 0.25" × 96": Volume = 48 × 0.25 × 96 = 1,152 in³. Steel density = 0.2836 lb/in³. Weight = 1,152 × 0.2836 = 326.7 lbs.
Metal density varies significantly by alloy. Within the steel family alone, densities range from 7.7 g/cm³ (some tool steels) to 8.0 g/cm³ (316 stainless). Aluminum alloys range from 2.6 (pure) to 2.8 g/cm³ (high-zinc alloys). Using the correct alloy density improves weight accuracy from ±10% (generic) to ±2% (alloy-specific).
For critical weight estimates in aerospace and automotive applications, use material test certificates that specify actual density. For general fabrication and procurement, the standard alloy densities in this calculator are sufficient.
Metal stock comes in standardized shapes: plate (flat), sheet (thin flat), round bar, square bar, hex bar, round tube/pipe, square tube, angle, channel, I-beam, and T-bar. Sizes follow imperial (inches) or metric (mm) standards depending on region.
In the US, plate and sheet are typically quoted in inches of thickness and feet of length. Bars are quoted by diameter or across-flats dimension. Pipe uses nominal pipe size (NPS) with schedule numbers determining wall thickness.
Weight calculations directly impact shipping costs. Trucking in the US is limited to 80,000 lbs gross vehicle weight (about 44,000-48,000 lbs payload). A single flatbed can carry roughly 48,000 lbs of steel. Overweight loads require special permits and routing. For international shipping, weight calculations determine containerization — a standard 20-foot container has a max payload of about 28 metric tons.
Mild (carbon) steel has a density of approximately 0.2836 lb/in³ (7.85 g/cm³ or 490 lb/ft³). Stainless steel is slightly higher at 0.289 lb/in³ (8.0 g/cm³). Tool steel ranges from 7.7-8.0 g/cm³.
Aluminum (6061) has a density of about 0.098 lb/in³ (2.71 g/cm³) — roughly 35% of steel's weight. This is why it's popular for weight-sensitive applications like aerospace, automotive, and portable equipment.
Use the tube/pipe formula: Weight = π/4 × (OD² - ID²) × Length × Density. The ID (inner diameter) = OD - 2 × wall thickness. Schedule 40 pipe has standardized wall thicknesses — check pipe tables for exact dimensions.
Minimally. Hot-rolled steel has mill scale adding <1% weight. Galvanized coating adds about 1-3%. Painted or powder-coated surfaces add negligible weight. For precision work, weigh actual pieces.
Within ±2-3% for standard metals. Actual density varies by alloy composition, heat treatment, and porosity. For critical applications (lifting, structural), use actual material certifications or weigh the pieces.
Lead at 11.34 g/cm³ (0.410 lb/in³) is the heaviest commonly used metal. Tungsten (19.3 g/cm³) is the heaviest engineering metal. Gold is 19.3 g/cm³. By comparison, aluminum is only 2.7 g/cm³.