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Cubic Feet Calculator

Convert volumes from cubic feet to cubic inches, cubic yards, gallons, liters, and cubic meters.

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Quick Summary

Use this when you need:

Convert appliance or tank volumes between cubic feet and gallons
Translate architectural specs from cubic yards into cubic meters
Check shipping crate volumes in metric for international paperwork

You’ll get:Volume

How this is calculated

Formula:

volume_target = volume_source * (source_to_cubic_meters / target_to_cubic_meters)

In plain language:

All entries are converted into cubic meters, then re scaled into the requested unit (cubic feet, gallons, liters, etc.) using their exact conversion factors.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

What these terms mean

Volume

Volume used in the calculation.

When to use this calculator

Convert appliance or tank volumes between cubic feet and gallons
Translate architectural specs from cubic yards into cubic meters
Check shipping crate volumes in metric for international paperwork

Last updated: November 18, 2025

Cubic feet conversion explained

Tank specs, crawl-space quotes, and HVAC schedules often list volume in cubic feet, yet designers and inspectors need gallons, liters, or cubic meters. The Cubic Feet Calculator routes every entry through cubic meters, applies authoritative conversion factors, and returns whichever unit your code submission or invoice requires.

How the conversion works

We normalize each input to cubic meters with the exact conversion $1\,\text{ft}^3 = 0.028316846592\,\text{m}^3$ . After that, converting into target units is a single multiplication:

\text{target} = \text{source} \times \frac{k_{\text{source}\to \text{m}^3}}{k_{\text{target}\to \text{m}^3}}

Because the path runs through cubic meters, you can mix imperial and metric inputs within one session and still keep the math consistent.

Units and conversions

Unit	Symbol	Relation
Cubic foot	ft³	$1\,\text{ft}^3 = 0.028316846592\,\text{m}^3$
Cubic inch	in³	$1\,\text{in}^3 = 1.6387064\times10^{-5}\,\text{m}^3$
Cubic yard	yd³	$1\,\text{yd}^3 = 0.764554857984\,\text{m}^3$
US gallon	gal (US)	$1\,\text{gal (US)} = 0.003785411784\,\text{m}^3$
Liter	L	$1\,\text{L} = 0.001\,\text{m}^3$

Worked examples

Basement dehumidifier sizing
A dehumidifier is rated for 12 ft³ per minute. Convert to gallons per minute to compare against plumbing specs.

12\,\text{ft}^3 \times 7.48052 \frac{\text{gal}}{\text{ft}^3} = 89.77\,\text{gal/min}

Result: about 90 gallons per minute of airflow capacity.

Metric paperwork
An HVAC plenum measures 1.2 m³. Report the same volume in cubic feet for a contractor that prices ductwork in imperial units.

\text{ft}^3 = \frac{1.2}{0.028316846592} \approx 42.38

Result: specify roughly 42.4 cubic feet.

Tips and pitfalls

Confirm whether "gallon" means U.S. customary or imperial; our calculator lists both so you do not mix them in tank calcs.
Keep volumes in cubic meters internally when combining data from architects and process engineers—then convert outward to whichever report needs a different unit.
For irregular shapes, break the space into rectangular or cylindrical sections, sum their cubic-foot values, and convert once at the end.
HVAC and building codes often cap duct or plenum volume in ft³; use the converter to show compliance in both SI and customary units.

References and further reading

Frequently Asked Questions

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Calculator info

Version:: v1.0.0
Sensitivity:: low

Last updated: November 18, 2025

Cubic feet conversion explained

How the conversion works

We normalize each input to cubic meters with the exact conversion $1\,\text{ft}^3 = 0.028316846592\,\text{m}^3$ . After that, converting into target units is a single multiplication:

\text{target} = \text{source} \times \frac{k_{\text{source}\to \text{m}^3}}{k_{\text{target}\to \text{m}^3}}

Because the path runs through cubic meters, you can mix imperial and metric inputs within one session and still keep the math consistent.

Units and conversions

Unit	Symbol	Relation
Cubic foot	ft³	$1\,\text{ft}^3 = 0.028316846592\,\text{m}^3$
Cubic inch	in³	$1\,\text{in}^3 = 1.6387064\times10^{-5}\,\text{m}^3$
Cubic yard	yd³	$1\,\text{yd}^3 = 0.764554857984\,\text{m}^3$
US gallon	gal (US)	$1\,\text{gal (US)} = 0.003785411784\,\text{m}^3$
Liter	L	$1\,\text{L} = 0.001\,\text{m}^3$

Worked examples

Basement dehumidifier sizing
A dehumidifier is rated for 12 ft³ per minute. Convert to gallons per minute to compare against plumbing specs.

12\,\text{ft}^3 \times 7.48052 \frac{\text{gal}}{\text{ft}^3} = 89.77\,\text{gal/min}

Result: about 90 gallons per minute of airflow capacity.

Metric paperwork
An HVAC plenum measures 1.2 m³. Report the same volume in cubic feet for a contractor that prices ductwork in imperial units.

\text{ft}^3 = \frac{1.2}{0.028316846592} \approx 42.38

Result: specify roughly 42.4 cubic feet.

Tips and pitfalls

Confirm whether "gallon" means U.S. customary or imperial; our calculator lists both so you do not mix them in tank calcs.
Keep volumes in cubic meters internally when combining data from architects and process engineers—then convert outward to whichever report needs a different unit.
For irregular shapes, break the space into rectangular or cylindrical sections, sum their cubic-foot values, and convert once at the end.
HVAC and building codes often cap duct or plenum volume in ft³; use the converter to show compliance in both SI and customary units.

Quick Summary

Calculator Tool

How this is calculated

What these terms mean

Volume

When to use this calculator

Cubic feet conversion explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Was this calculator helpful?

Found an error?

Calculator info

Cubic feet conversion explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Volume Converter

cc to Liter Converter

Gallons to Pints Converter

Gallons to Quarts Converter

Cubic Meter Calculator

cc to mL Converter

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Found an error?

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