Shape
Volume calculator
Cubic Calculator
Build a cubic measurement from simple shapes, combined forms, quantities, and subtractions.
Calculating
Unit converter
Cubic volume unit converter
1 m³35.31 ft³
ft³35.31 ft³
yd³1.31 yd³
liters1,000 liters
US gal264.17 US gal
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Open a focused calculator when the main keyword changes.
How to use
How to calculate volume for your project
Switch between these options to match the way you are using the calculator right now.
Enter one shape and read the live total
- Choose the shape that matches the object you are measuring.
- Enter the required dimensions and confirm the input unit.
- Use the result panel to read cubic meters, cubic feet, liters, or gallons.
Start with the default box, then switch shapes when the object is not rectangular.
Guide
Cubic calculator guide
Use this cubic calculator when the result needs to describe cubic measurement across one or more solid shapes.
Cubic measurement formula
For a box, cubic measurement = length x width x height. For combined objects, calculate each component, add included components, and subtract voids.
Example cubic calculation
One section is 4 ft x 3 ft x 2 ft and another section adds 2 ft x 2 ft x 1 ft.
(4 x 3 x 2) + (2 x 2 x 1) = 28
The combined cubic measurement is 28 ft3 before unit conversion.
Unit notes
- Cubic measurement always combines three dimensions.
- A cubic unit changes quickly when the length unit changes, so convert before comparing results.
- Use subtract mode for holes, cut-outs, or empty sections.
Best uses
- Boxes and crates
- Combined shapes
- Cut-out checks
- Quantity totals
Common mistakes
- Calculating only surface area instead of a three-dimensional result.
- Adding a cut-out instead of subtracting it from the total.
- Rounding dimensions too early before combining components.
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What is a cubic calculator used for?
A cubic calculator is used to calculate a three-dimensional measurement from length, width, height, radius, depth, or shape-specific dimensions.
How do I calculate cubic measurement?
For a rectangular shape, multiply length by width by height. For mixed shapes, calculate each component and combine the totals.
Can the cubic calculator subtract volume?
Yes. Set a component to subtract when it represents a void, sleeve, hole, opening, or removed section.
Can I use the cubic calculator for cylinders?
Yes. Choose the cylinder shape and enter radius or diameter-related dimensions shown by the calculator.
Does quantity change the cubic result?
Yes. Quantity multiplies the component volume, so it should be set before using the final total.
This calculator provides estimates based on the dimensions and assumptions you enter. For engineering, structural, freight, or purchasing decisions, verify the result with a qualified professional or supplier.