Volume Calculator
Calculate rectangular volume from length, width and height.
Calculation example
Inputs: Length: 20 ft, Width: 15 ft, Height: 2 ft
Result: 600 cubic units
A 20 by 15 by 2 rectangular volume is 600 cubic units.
Formula
Volume = length × width × height.
How to use this calculator
Multiply length by width by height using consistent units.
Before you calculate
Measure the project dimensions as accurately as practical and keep all measurements in compatible units. For material products, use the coverage, yield, density, or package size stated by the manufacturer or supplier rather than a generic assumption.
Choose the waste allowance based on the project shape, installation method, cutting requirements, and material characteristics. A simple rectangular estimate may need adjustment for openings, corners, slopes, joints, patterns, compaction, or other site conditions.
Understanding the result
The calculator provides a planning estimate based on the inputs shown above. It is not a substitute for project drawings, structural design, manufacturer instructions, or local requirements. Before ordering, compare the calculated quantity with the supplier's package sizes and ordering units.
Tips
- This tool assumes a rectangular shape.
- Use consistent units for all dimensions.
Frequently asked questions
How is rectangular volume calculated?
Length, width and height are multiplied.
Can this calculate irregular shapes?
No. It assumes a rectangular shape.
Related calculators
Use compatible units and verify estimates against project specifications, local requirements and manufacturer instructions.