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Rectangular Cuboid Weight Calculator.

Calculate volume and mass from cuboid dimensions and an explicit density

On-device calculationNo signup
01

Set your values

Results update as you type.

Volume: 1 m³

Volume

0.000m³
Mass: 7,850 kg

Mass

0.000kg
Mass: 7.85 tonnes

Mass

0.000tonnes
Weight force: 76,982.203 N

Weight force

0.000N

Density is an explicit input. Steel helpers use 7,850 kg/m³ by default; actual alloy and product values may differ.

Use Cases

Construction Material Estimation

Quickly estimate the weight of concrete blocks, steel beams, or other cuboid-shaped materials for transport and structural planning.

Example: Calculate the weight of a concrete slab (2m × 1m × 0.15m) with density 2400 kg/m³.

Shipping and Logistics

Determine the weight of packaged goods or cargo to ensure compliance with weight limits and calculate shipping costs.

Example: Find the weight of a wooden crate (1.2m × 0.8m × 0.6m) with density 600 kg/m³.

Frequently Asked Questions

How do I calculate the weight of a rectangular cuboid?
Enter the length, width, and height of the cuboid, along with the material density. The calculator first computes the volume (length × width × height) and then multiplies it by the density to get the mass (weight).
What units can I use for the cuboid dimensions and density?
The calculator accepts any consistent units for length, width, height, and density. For example, if you use meters for dimensions and kg/m³ for density, the weight will be in kilograms. Ensure all dimensions are in the same unit.
Can I use this calculator for any material?
Yes, as long as you know the density of the material. Common densities are provided for reference, but you can input any density value to get the weight for that specific material.

Tips & Common Mistakes

Tips

  • Ensure all dimensions are in the same unit before entering them to avoid calculation errors.
  • Use the density of the actual material, as variations can significantly affect the weight.
  • For hollow or non-solid cuboids, adjust the density or dimensions to account for empty space.
  • Double-check your inputs for accuracy, especially when dealing with large or heavy objects.

Common Mistakes to Avoid

  • Mixing units, such as using meters for length and centimeters for width, which leads to incorrect volume and weight.
  • Using the density of a different material or an outdated value, causing inaccurate weight estimates.
  • Forgetting to convert the final weight to the desired unit (e.g., from kilograms to pounds) if needed.

Last updated: August 13, 2026