Material Weight Calculator
Material weight is density times volume. Use the working metal weight calculator for bar, tube, plate, angle and other stock shapes, then choose the material density that matches the job.
material weight calculator material weight by density density times volume
Material weight formula
The general formula is weight equals density times volume. For stock sections, volume is cross-section area times length.
weight = density * area * length
What changes by shape
- Round bar: area = pi * d^2 / 4.
- Flat bar or plate: area = width * thickness.
- Round tube: area = pi * (OD^2 - ID^2) / 4.
Worked example
A material with density 7.85 g/cm3, area 490.9 mm2 and length 1000 mm weighs 7.85 * 490.9 * 1000 / 1,000,000 = 3.85 kg.
Frequently asked questions
Is material weight different from metal weight?
The formula is the same. The calculator handles different materials by changing density.
Which density should I use?
Use the material certificate for critical work. For estimates, choose the nearest material in the calculator or density chart.
Related pages
- Metal weight calculator - working calculator for bar, tube, plate and angle stock.
- Metal weight formula - unit conversions, density and cross-section formulas.
- Material density chart - density values for steel, stainless, aluminum, brass and more.
- Bar weight calculator - round, square, hex and flat bar formulas.