Weight from Volume — How to Calculate Mass of Any Material

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Overview

Knowing the density of a material lets you calculate its weight from volume alone. Essential for structural loading, shipping, and material purchasing.

The Formula

Mass = Density × Volume | Weight (Newtons) = Mass × 9.8

Standard formula used by professionals worldwide

Worked Example

Step-by-step

Steel beam 2m × 0.1m × 0.1m = 0.02m³ | Steel density 7,850 kg/m³ | Mass = 157kg | Weight = 1,539N

Key Points

Accuracy: Results are as accurate as your inputs
Units: Always use consistent units throughout
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Frequently Asked Questions

Density of common materials?

Water: 1,000 kg/m³ | Concrete: 2,400 | Steel: 7,850 | Aluminium: 2,700 | Wood: 500-800.

Why does concrete density vary?

Mix ratios, aggregate type, water content, and air entrainment all affect final density.

How do ships calculate load capacity?

Maximum cargo weight = (Waterline displacement − Ship weight). Related to buoyancy and density.

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