Gallon (US) to Cubic Meter Converter

Volume Converter

40 units available

Decimals:

From

To

0.003785

1 gal = 0.003785 m³

Formula:

m³ = gal × 0.0037854118

With your value: 1 gal = 0.00378541 m³

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (us) so you can sanity-check the result.

Milk carton (1/3.8e+3 your value)0.000264 gal

Kitchen bucket (1/3.8e+2 your value)0.00264 gal

Car fuel tank (1/76 your value)0.0132 gal

Bathtub (1/19 your value)0.0528 gal

Hot tub (1/2.5 your value)0.396 gal

Your value1.00 gal

Other Gallon (US) to Cubic Meter conversions

2 gal to m³ 3 gal to m³ 4 gal to m³ 5 gal to m³ 6 gal to m³ 7 gal to m³ 8 gal to m³

Gallon (US) to Cubic Meter Conversion Table

Gallon (US) (gal)	Cubic Meter (m³)
0.5	0.001893
1	0.003785
2	0.007571
5	0.018927
10	0.037854
15	0.056781
20	0.075708
25	0.094635
50	0.189271
100	0.378541
250	0.946353
500	1.892706
1000	3.785412

Cubic Meter to Gallon (US) Conversion Table

Cubic Meter (m³)	Gallon (US) (gal)
0.5	132.086026
1	264.172052
2	528.344105
5	1,320.860262
10	2,641.720524
15	3,962.580785
20	5,283.441047
25	6,604.301309
50	13,208.602618
100	26,417.205236
250	66,043.01309
500	132,086.026179
1000	264,172.052358

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (US) (gal)

Volume

Exact conversion

The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Cubic Meter (m³)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Gallon (US) to Cubic Meter

To convert from Gallon (US) (gal) to Cubic Meter (m³), multiply the value by 0.0037854118.

Formula: m³ = gal × 0.0037854118

Reverse: gal = m³ × 264.1720523581

Step-by-Step Example

Start with your value in Gallon (US). For example: 5 gal
Multiply by the conversion factor: 5 x 0.0037854118
The result is: 0.018927 m³

About Gallon (US)

The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.

Fun Fact: The US gallon is about 20% smaller than the imperial (UK) gallon.

Common uses: fuel (US), beverages, swimming pools.

About Cubic Meter

The cubic meter is the SI unit of volume, equal to 1,000 liters. It is used for large-volume measurements.

Common uses: construction, water usage, shipping.

Frequently Asked Questions

How many Cubic Meter are in 1 Gallon (US)?

There are exactly 0.0037854118 Cubic Meter in 1 Gallon (US). This means the conversion factor from Gallon (US) to Cubic Meter is 0.0037854118.

What is the formula to convert Gallon (US) to Cubic Meter?

The formula to convert Gallon (US) to Cubic Meter is: m³ = gal × 0.0037854118. For example, to convert 10 Gallon (US) to Cubic Meter, you would multiply 10 by 0.0037854118.

What is a Gallon (US)?