Rectangular Prism Volume Calculator
Find the volume of a rectangular prism or box from length, width and height with this free calculator that works in your browser.
Enter Values
Shape
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the length, width and height.
- Press Calculate.
How it works
A rectangular prism (box) has volume length × width × height. With all three in metres the volume is in cubic metres (m³); multiply by 1,000 for litres.
Worked example
2 × 3 × 4 m. = 24 m³.
Frequently asked questions
Is a rectangular prism the same as a box?
Yes — it's a box shape. Volume = length × width × height.
How do I get litres or capacity?
Work the volume in cubic metres, then × 1,000 for litres. 24 m³ = 24,000 L.
Related tools
- Cube Volume Calculator
- Cylinder Volume Calculator
- Cone Volume Calculator
- Pyramid Volume Calculator
- Hemisphere Volume Calculator
- Torus Volume Calculator
Explore more in Geometry, Shape, Area & Volume.
Cite this tool
Zerdly. (2026). Rectangular Prism Volume Calculator. Retrieved from https://www.zerdly.com/tools/rectangular-prism-volume-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.