Cubic Feet to Cubic Meters Calculator and Formula

Updated 5 November 2026 · Standard formula, shown below

Cubic meters 0.028317 m^3

Liters: 28.317 L; Result
Volume: 1 ft^3; You entered

Use this cubic feet to cubic meters calculator to convert a volume in cubic feet (ft³) into cubic meters (m³). Enter a nonnegative volume in cubic feet; the calculator returns the equivalent volume in cubic meters, with a second result in liters for a practical reference.

Formula

To convert cubic feet to cubic meters, multiply the volume in cubic feet by the exact conversion factor 0.028316846592:

V_m³ = V_ft³ × 0.028316846592

V_m³ is the volume in cubic meters.
V_ft³ is the volume in cubic feet.

The factor comes from the length conversion 1 foot = 0.3048 meter. Since volume has three dimensions, cube that length factor: (0.3048 m/ft)³ = 0.028316846592 m³/ft³. To express the result in liters, multiply cubic meters by 1,000, because 1 m³ = 1,000 L.

Worked Example

Using the calculator’s default input of 1 ft³:

Convert to cubic meters: 1 ft³ × 0.028316846592 = 0.028316846592 m³.
Round the cubic-meter result to six decimal places: 0.028317 m³.
Convert that unrounded result to liters: 0.028316846592 m³ × 1,000 = 28.316846592 L.
Round liters to three decimal places: 28.317 L.

The calculator displays rounded results, but retains the full conversion factor in its calculation. This avoids adding unnecessary rounding error when deriving liters from the cubic-meter result.

How the Conversion Works

A cubic foot is the volume of a cube with sides measuring one foot each. A cubic meter is the volume of a cube with sides measuring one meter each. Because both are measures of three-dimensional space, converting between them requires cubing the conversion between feet and meters—not merely multiplying by the length factor once.

For a quick estimate, 1 ft³ is about 0.0283 m³, and 1 m³ is about 35.3147 ft³. The exact factor used here is preferable when accuracy matters. For instance, 100 ft³ is 2.8316846592 m³, or about 2.832 m³ when rounded to three decimal places.

When to Use It and How to Read the Result

Use this conversion when a volume is provided in cubic feet but a project, specification, or comparison uses metric units. Cubic feet are common in US customary measurements; cubic meters are the corresponding SI volume unit. The calculation changes the unit, not the amount of space represented.

Room or storage volume: Convert a stated capacity before comparing it with a measurement in m³.
Shipping or material quantities: Convert volume figures when a document uses different unit systems. The calculator does not determine weight, quantity of material, or shipping requirements.
Small volumes: Liters can be easier to interpret than a small fraction of a cubic meter. Remember that 1 L equals 0.001 m³.

Read the first result as the converted cubic-meter volume and the second as the same volume in liters. They are not separate measurements; they are equivalent ways of stating the input. Keep the unit with the number: 2.8 m³ and 2.8 ft³ are very different volumes.

Common Mistakes and Accuracy

The most common error is treating a volume conversion like a length conversion. Multiplying cubic feet by 0.3048 converts a length in feet to meters; it does not convert cubic feet to cubic meters. For volume, use the cubed factor, 0.028316846592.

Check the input unit: ft³ is not the same as square feet (ft²), which measures area, or feet (ft), which measure length.
Do not confuse US gallons with cubic feet: A gallon is a unit of volume, but converting it requires its own conversion factor. The calculator accepts ft³ only.
Round at the end: Early rounding can slightly change the final answer, especially for large values or repeated conversions.
Use sensible precision: Six decimal places are useful for a calculator display, but a rough estimate or measured input may not justify that many meaningful digits.

The mathematical conversion is exact when the defined foot-to-meter relationship is used. The number of digits appropriate for a real-world answer still depends on the precision of the original measurement. A calculator cannot make an approximate measurement more precise.

Frequently Asked Questions

How many cubic meters are in one cubic foot?
One cubic foot equals exactly 0.028316846592 cubic meters. Rounded for everyday use, that is about 0.0283 m³.

How do I convert cubic feet to cubic meters by hand?
Multiply the number of cubic feet by 0.028316846592. For example, 10 ft³ × 0.028316846592 = 0.28316846592 m³, or about 0.283 m³.

How many cubic feet are in one cubic meter?
One cubic meter is approximately 35.3147 cubic feet. To convert in that direction, divide cubic meters by 0.028316846592, or multiply by about 35.3147.

Is a cubic foot the same as a square foot?
No. A square foot measures area in two dimensions; a cubic foot measures volume in three dimensions. They cannot be converted directly without additional information, such as a depth or height.

How many liters are in a cubic foot?
One cubic foot is approximately 28.3168 liters. This follows from 1 ft³ = 0.028316846592 m³ and 1 m³ = 1,000 L.

Why is the cubic-meter result a small number?
A meter is longer than a foot, so a cubic meter holds much more space than a cubic foot. As a result, the same volume expressed in cubic meters has a smaller numerical value: 1 ft³ is about 0.0283 m³.

Formula used

in volume | Volume | ft^3 | 1 | 0
out meters | Cubic meters | m^3 | volume * 0.028316846592 | 6
out liters | Liters | L | meters * 1000 | 3

Each line is one input (in, sel, list) or one result (out: label, unit, formula, decimals). How the calculators work

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.