Steel & Metal Weight Calculator
Estimate pounds and US tons for plate, bar, tube, HSS or sections with a published weight per foot. Combine metal items, apply weight allowance and review grouped specifications.
Steel & Metal Weight Calculator
Calculate geometric weight for common metal shapes or use a known published weight per foot.
Need a Complete Steel or Metal Takeoff?
Get drawing-based structural and miscellaneous metals quantities for members, plates, HSS, decking and fabricated scope.
Steel & Metals Estimating ServicesHow to use the steel weight calculator
- Name the item and choose a material or Custom Density.
- Select the shape and enter its dimensions in inches, length in feet and physical quantity in whole pieces.
- Enter a weight allowance if needed. Add separate items for different materials, dimensions or specifications.
- Calculate and review each item, project totals and the grouped Material Summary.
Use Known Weight / LF when you have a published section weight. Physical quantity is the number of pieces; pounds and US short tons are calculated.
How metal weight is calculated
Cross-sectional area × Length = Volume. The calculator converts length from feet to inches, then multiplies volume in cubic inches by density in lb/in³. Net weight equals weight per piece multiplied by physical quantity. One US short ton equals 2,000 lb.
Shape formulas
- Plate / Sheet and Flat Bar: width × thickness.
- Round Bar: π × diameter² ÷ 4.
- Square Bar: side².
- Rectangular Bar: width × height.
- Round Tube / Pipe: outside-circle area minus inside-circle area; inside diameter = outside diameter − 2 × wall thickness.
- Square / Rectangular HSS: outside area minus the hollow inside area; subtract twice the wall thickness from each outside dimension.
Geometric tube/HSS weights intentionally ignore corner radii. For published pipe or HSS weights, use Known Weight / LF. This steel tube weight calculator estimates material quantity; it does not verify structural capacity.
Material density presets
The metal weight calculator uses the following estimating densities. Actual alloy density can vary. Choose Custom Density when a project-specific value is known.
| Material | Density, lb/in³ |
|---|---|
| Carbon / Mild Steel | 0.2836 |
| Stainless Steel | 0.2890 |
| Aluminum | 0.0975 |
| Copper | 0.3230 |
| Brass | 0.30314 |
To use it as an aluminum weight calculator, select Aluminum while retaining the required shape and dimensions. Changing density changes weight, not geometry.
Worked example: steel plate weight
For one ½-in × 48-in × 8-ft carbon-steel plate:
- Section area: 0.5 × 48 = 24 in².
- Volume: 24 × (8 × 12) = 2,304 in³.
- Net weight: 2,304 × 0.2836 = 653.4144 lb.
- With 5% allowance: 653.4144 × 1.05 = 686.08512 lb.
- Net US tons: 653.4144 ÷ 2,000 = 0.3267072.
The steel plate weight calculator uses the entered dimensions rather than a gauge-to-thickness lookup. A separate steel bar weight example—1-in diameter × 10-ft carbon/mild steel—equals 26.7286702967 lb before display rounding.
Known Weight / LF for published sections
Enter a section description and a published lb/ft value for W-shapes, channels, angles, tees, proprietary sections or published pipe/HSS weights. The calculator does not contain an AISC shape database or select a member for you.
26 lb/ft × 20 ft × 3 EA = 520 lb/piece, 1,560 net lb and 0.78 US tons. Material density is intentionally unused in this mode; the entered weight per foot is the calculation basis.
Allowance and multiple metal items
Weight with Allowance = Net Weight × (1 + allowance% ÷ 100). Allowance changes weight only. It does not generate additional physical pieces or optimize cutting.
Combine different metals and shapes to see Total Pieces, Total LF, Net Weight, Weight with Allowance, Net US Tons, Tons with Allowance and a grouped Material Summary. Compatible specifications group by material/density, shape, exact dimensions and length. Known Weight / LF groups by description, exact lb/ft and length. Grouped allowances sum the item calculations.
At 0% allowance, the default plate (653.4144 lb), a 1×1-in square bar × 10 ft (34.032 lb), 6×4×¼-in rectangular HSS × 10 ft (161.652 lb), and three 20-ft sections at 26 lb/ft (1,560 lb) total 2,409.0984 lb / 1.2045492 US tons.
What this metal weight estimator does not calculate
V1 does not provide structural capacity/design, an AISC section database, beam/member selection, section modulus or moment of inertia, weld sizing, connection design, fabrication labor, pricing, coating/galvanizing weight or cut optimization.
Frequently asked questions
How do I calculate steel weight?
Multiply cross-sectional area by length in matching units to obtain volume, then multiply by density. Multiply the result by the number of identical pieces.
How much does steel weigh per cubic inch?
The Carbon / Mild Steel preset uses 0.2836 lb/in³. This is an estimating assumption; use the appropriate project or alloy density when known.
How do I calculate plate weight?
Multiply thickness × width × length in inches, then multiply by density. Enter length in feet here; the calculator handles the conversion.
How do I calculate round-bar weight?
Use πD²/4 for section area, multiply by length in inches and then by density. A 1-in diameter carbon-steel bar × 10 ft weighs approximately 26.72867 lb.
How does the calculator handle tubing and HSS?
It subtracts the hollow inside area from the outside area. Geometric HSS calculations ignore corner radii. Use published weight per foot when that is the desired basis.
Can I calculate aluminum, stainless, copper or brass?
Yes. Select the matching material preset and enter the shape, dimensions, length and quantity.
What is Custom Density?
It lets you enter a known density in lb/in³ for a project-specific material or alloy. It applies to geometric shapes.
What is Known Weight / LF?
It multiplies your published pounds per linear foot by length and piece count. Density is unused in this mode.
Can I calculate W-shapes, channels and angles?
Yes, through Known Weight / LF. Supply the section description and published weight yourself; V1 does not look up AISC sections.
Does allowance increase the number of pieces?
No. It increases the planning weight only. The physical piece count stays exactly as entered.