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Percentage Calculator
Find a percentage of a number, what percent one number is of another, or the whole from a part.
Volume Calculator
Calculate the volume of a cube, box, cylinder, sphere, cone or pyramid in any unit, with liters and gallons.
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How to use this calculator
Enter your values after choosing the type of calculation in the tabs. The result updates as you type; press Calculate to confirm and jump to the result on mobile. Use Share to send the calculator with your result.
Volume formulas
Cube V = a³
Box V = length × width × height
Cylinder V = π × r² × h
Sphere V = 4/3 × π × r³
Cone V = π × r² × h ÷ 3
Pyramid V = base² × h ÷ 3 (square base)
Use the same unit for every dimension, or pick a unit for each and the calculator converts. 1 m³ = 1,000 L = 264.17 US gallons.
Example
A cylinder tank with a 1 ft radius and 3 ft height: π × 1² × 3 = 9.42 ft³, about 70.5 US gallons.
Frequently asked questions
How do I find the volume of a box?
Multiply length × width × height.
How many gallons are in a cubic foot?
About 7.48 US gallons.
About this tool
- Written by
- [Author: to be assigned]
- Reviewed by
- Formula tests passed · human review pending
- Last updated
- 31 Oct 2026
See our methodology and editorial policy. Think something’s off? Report an error with this tool.
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