Skip to content
OverCalculator
Theme
ConversionMore in Length & areaComparisons: ConversionAngles & coordinatesData & number systemsEnergy & powerMass & weightMore conversionsTemperature & pressure

Cubic Meter Calculator

Calculate rectangular cubic meters and show exact dimensional liters, cubic feet, and U.S.-gallon equivalents.

Published

Volume

Cubic meters
3 m³
Cubic feet
105.944 ft³
US gallons
792.516 gal
Liters
3,000 L

2 m × 1.5 m × 1 m = 3 m³.

m
m
m

Results update as you type.

Worked example

length: 2 · width: 1.5 · height: 1

Result: 3 m³

Try it →

Cubic Meter Calculator

Enter nonnegative side lengths in meters.

m3=length×width×height\text{m}^3=\text{length}\times\text{width}\times\text{height}

One cubic meter is exactly 1,000 liters. From the exact international-foot definition, 1 m³ = 1 ÷ 0.3048³ = 35.314666721488… ft³. From the defined U.S. liquid gallon, 1 m³ = 1,000 ÷ 3.785411784 = 264.172052358148… US gal.

For 2 m × 1.5 m × 1 m, the result is 3 m³, 3,000 L, about 105.944 ft³, and 792.516 US gal. Inputs producing an invalid numeric result are rejected.

Related: the cubic feet calculator for the imperial counterpart, the cubic feet to cubic meters converter to convert the result to ft³, and the l to gal converter for the liter–gallon relationship.

Sources

Frequently asked questions

What arithmetic does this calculator use?
The method and defining factors are shown on the page. Arithmetic retains the full factor and rounds only the display.
What inputs are rejected?
Negative or invalid numeric inputs, unknown unit selections, and values whose results are too large are rejected.

Sources

  • NIST-SP811

    primary · Aug 11, 2026

    Supports: NIST SP 811 supports the meter-based volume arithmetic, the 1,000 liters per cubic meter relationship, and the exact 0.3048 m international foot used to derive the cubic-foot factor.

  • NIST-HB44-APPC

    primary · Aug 11, 2026

    Supports: Handbook 44 Appendix C's U.S. gallon definition (231 cubic inches) and customary volume tables back the 264.172052358148 U.S. gallons per cubic meter conversion.

Related calculators

Cubic Feet CalculatorCalculate a rectangular volume in cubic feet and show exact dimensional metric and U.S.-gallon equivalents.Cubic Meter to Metric Tonne CalculatorConvert cubic meters to metric tonnes when you know density in tonnes per cubic meter.cc to Grams ConverterConvert cubic centimeters to grams using a water approximation or a density you provide.cc to Liter ConverterConvert cubic centimeters to liters for engine displacement, tanks, lab batches, dosing volumes, and metric capacity checks using the exact 1,000 cc per liter relationship.Cubic Feet to Pounds CalculatorConvert cubic feet to pounds using an entered density in lb/ft³, with results in pounds, short tons, and kilograms.Cubic Yards to Short Tons CalculatorConvert cubic yards to US short tons when you know bulk density in short tons per cubic yard.

Cubic Meter Calculator updated at

Verified

Found an error? Report it