Sculpture Weight Calculator

How heavy is that bronze or stone piece? Choose the nearest shape, enter its size and pick the material. The calculator multiplies the volume by the material density to estimate the weight, which helps with shipping, display stands and handling.

Sculpture weight

Use 100 for solid. Lower it for hollow casts or irregular shapes inside the box

How it works

Weight = volume × density. The volume comes from the shape you choose: length × width × height for a block, π × radius² × height for a cylinder, 4/3 × π × radius³ for a sphere, and one third of the cylinder volume for a cone.

Densities vary with the exact alloy or stone, so the values listed are typical figures. If you know the density of your material, choose Other and enter it.

Worked example

A solid bronze block of 20 × 15 × 30 cm has a volume of 9,000 cm³ (9 litres). At about 8.8 g/cm³, it would weigh about 79.2 kg. The same block in marble, at about 2.7 g/cm³, would weigh about 24.3 kg.

Good to know

  • Real sculptures are rarely perfect shapes. Use the shape that best fits the overall form, then lower the solid percentage to allow for empty space.
  • Many metal sculptures, including lost-wax casts, are hollow and weigh far less than a solid piece of the same size. Lower the solid percentage to estimate this.
  • Wood density changes with moisture and species. For anything that matters, such as a plinth or wall fixing, weigh the piece or ask the maker.

Frequently asked questions

How do I estimate the weight of an irregular sculpture?

Pick the shape that best contains it, such as a block for a standing figure, then reduce the solid percentage to allow for the empty space around and inside it.

Why is my bronze sculpture lighter than the estimate?

Many cast bronzes are hollow. A solid estimate is an upper limit, so lower the solid percentage for a hollow cast.

How accurate are the material densities?

They are typical values. Alloys, stones and woods vary, so the result is an estimate. Enter your own density for a better figure.

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