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US gallons to Cubic meters Converter

1 gal = 0.00378541 m³ (US gallon → cubic meter)

1 gal = 0.00378541 m³

1 US gallon equals 0.00378541 cubic meters. To convert US gallons to cubic meters, multiply the US gallon value by 0.00378541. For quick reference: 1 gal = 0.00378541 m³, 5 gal = 0.0189271 m³, 10 gal = 0.0378541 m³, 100 gal = 0.378541 m³.

0.00378541
FormulaCubic meters = US gallons × 0.00378541
Quick

How to convert US gallons to cubic meters

  1. Take your value

    Start with your value in US gallons.

  2. Multiply by 0.00378541

    Multiply the US gallon value by 0.00378541. This is the exact conversion factor from US gallons to cubic meters.

  3. Read the result

    The product is your value in cubic meters. For example, 5 gal × 0.00378541 = 0.0189271 m³.

Conversion formula

The exact factor from US gallons to cubic meters is 0.00378541.

Cubic meters = US gallons × 0.00378541

US gallons to Cubic meters conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from US gallons to cubic meters
US gallons (gal)Cubic meters (m³)
0.1 gal0.00037854 m³
0.25 gal0.00094635 m³
0.5 gal0.0018927 m³
1 gal0.0037854 m³
1.5 gal0.0056781 m³
2 gal0.0075708 m³
2.5 gal0.0094635 m³
3 gal0.011356 m³
4 gal0.015142 m³
5 gal0.018927 m³
6 gal0.022712 m³
7 gal0.026498 m³
8 gal0.030283 m³
9 gal0.034069 m³
10 gal0.037854 m³
12 gal0.045425 m³
15 gal0.056781 m³
20 gal0.075708 m³
25 gal0.094635 m³
30 gal0.11356 m³
40 gal0.15142 m³
50 gal0.18927 m³
60 gal0.22712 m³
75 gal0.28391 m³
100 gal0.37854 m³
125 gal0.47318 m³
150 gal0.56781 m³
200 gal0.75708 m³
250 gal0.94635 m³
300 gal1.1356 m³
400 gal1.5142 m³
500 gal1.8927 m³
600 gal2.2712 m³
750 gal2.8391 m³
1000 gal3.7854 m³
1500 gal5.6781 m³
2000 gal7.5708 m³
2500 gal9.4635 m³
3000 gal11.356 m³
4000 gal15.142 m³
5000 gal18.927 m³
7500 gal28.391 m³
10000 gal37.854 m³
15000 gal56.781 m³
20000 gal75.708 m³
25000 gal94.635 m³
30000 gal113.56 m³
40000 gal151.42 m³
50000 gal189.27 m³
100000 gal378.54 m³

Real-world reference

A standard US milk jug holds 1 gal. An average car's fuel tank is 12–16 gal.

Frequently asked questions

How many cubic meters are in 1 US gallon?
1 US gallon equals 0.00378541 cubic meters.
How do I convert US gallons to cubic meters?
Multiply the US gallon value by 0.00378541. So x gal × 0.00378541 = the equivalent in m³.
What is 5 US gallons in cubic meters?
5 US gallons equals 0.0189271 cubic meters.
What is 10 US gallons in cubic meters?
10 US gallons equals 0.0378541 cubic meters.
What is 100 US gallons in cubic meters?
100 US gallons equals 0.378541 cubic meters.
How do I convert back from cubic meters to US gallons?
Multiply the cubic meter value by 264.172. For example, 1 m³ = 264.172 gal.
Is the US gallon bigger than the cubic meter?
No. 1 US gallon is smaller than 1 cubic meter. It takes 264.172 US gallons to equal 1 cubic meter.
Are these conversion factors exact?
The factor is derived directly from the SI definitions of US gallon and cubic meter; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

About the US gallon and the cubic meter

The US gallon

The US liquid gallon equals exactly 3.785411784 liters, defined as 231 cubic inches. It is the standard fuel and milk unit in the United States. The US gallon is about 16.7% smaller than the UK (imperial) gallon (4.54609 L), so quoting fuel economy as 'mpg' without specifying the gallon can mislead by a wide margin.

The cubic meter

The cubic meter equals exactly 1,000 liters. It is the SI-derived unit of volume, used for bulk shipping (freight 'cbm' pricing), concrete and soil quantities, and household water and gas billing outside the US.

Related converters

Cubic meters to US gallons
m³ → gal
Liters to US pints
L → pt
Liters to Tablespoons
L → tbsp
Liters to Teaspoons
L → tsp
US gallons to Milliliters
gal → mL
US gallons to Liters
gal → L

Sources