How do I convert gal to m³?

Use the formula shown above or enter a value to see gal converted to m³ instantly.

What is the formula for gal to m³?

The converter calculates m³ by applying the category-specific conversion factor for Volume.

When should I use gal vs m³?

gal and m³ are both part of the Volume category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Volume Converter & Liquid Reference

Convert gal to m³

Use the live converter below to translate between Gallon (US) (gal) and Cubic Meter (m³). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

gal → m³

Gallon (US)

gal

Cubic Meter

0.0038

m³

Rounded result (4 decimals max)

Formula

1 gal = 0.0038 m³

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from m³ to gal.

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gal to m³ quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Gallon (US) (gal)	Cubic Meter (m³)
0.25 gal	0.0009 m³
0.5 gal	0.0019 m³
1 gal	0.0038 m³
2 gal	0.0076 m³
5 gal	0.0189 m³
10 gal	0.0379 m³
25 gal	0.0946 m³
100 gal	0.3785 m³

m³ back to gal

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Cubic Meter (m³)	Gallon (US) (gal)
0.25 m³	66.043 gal
0.5 m³	132.086 gal
1 m³	264.1721 gal
2 m³	528.3441 gal
5 m³	1,320.8603 gal
10 m³	2,641.7205 gal
25 m³	6,604.3013 gal
100 m³	26,417.2052 gal

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