Math
Pyramid Volume Calculator
Use this pyramid volume calculator for rectangular or square pyramids when you know the base dimensions and vertical height.
Use vertical height from the base plane to the apex, not slant height.
Volume
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- Volume
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- Base area
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- Matching prism volume
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Student quick launch
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Study path
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What the pyramid volume calculator solves
Use this pyramid volume calculator for rectangular or square pyramids when you know the base dimensions and vertical height.
Formula
How to use it
- Enter the shape dimensions using one consistent unit system.
- Check the formula and supporting measures before copying the answer.
- Use square units for area results and cubic units for volume results.
How to read the answer
A pyramid has one-third the volume of a prism with the same base and perpendicular height.
Common mistakes and edge cases
- Use perpendicular height, not slant height.
- Find the base area first.
- Use cubic units for the final volume.
Worked examples
Rectangular pyramid
Volume
Volume = 90 cubic units
Square pyramid
Volume
Volume = 40 cubic units
Missing height
Volume
Error
Frequently asked questions
Why divide pyramid volume by 3?+
Three congruent pyramids can fill a prism with the same base and height, so each pyramid is one third of that volume.
Can this handle triangular pyramids?+
This calculator uses a rectangular base. For a triangular pyramid, use triangle area as the base area and still multiply by height divided by 3.
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Last updated: May 15, 2026