US Gallon to Cubic Meter Converter
One US Gallon equals 0.003785411784 Cubic Meter (1 gal = 0.003785411784 m3). Multiply a US Gallon value by 0.003785411784 to get the equivalent in Cubic Meter. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
m3 = gal × 0.003785411784
Multiply the US Gallon value by 0.003785411784 to get the equivalent value in Cubic Meter.
Example Conversions
1 US Gallon (gal)
0.003785411784 Cubic Meter (m3)
5 US Gallon (gal)
0.01892705892 Cubic Meter (m3)
10 US Gallon (gal)
0.03785411784 Cubic Meter (m3)
25 US Gallon (gal)
0.0946352946 Cubic Meter (m3)
100 US Gallon (gal)
0.3785411784 Cubic Meter (m3)
Conversion Table
| US Gallon (gal) | Cubic Meter (m3) |
|---|---|
| 0.1 | 0.0003785411784 |
| 0.5 | 0.001892705892 |
| 1 | 0.003785411784 |
| 2 | 0.007570823568 |
| 5 | 0.01892705892 |
| 10 | 0.03785411784 |
| 25 | 0.0946352946 |
| 50 | 0.1892705892 |
| 100 | 0.3785411784 |
| 250 | 0.946352946 |
| 500 | 1.892705892 |
| 1000 | 3.785411784 |
How to Convert Manually
Use these steps to convert US Gallon values to Cubic Meter without the calculator.
- Write down the value in US Gallon (gal) that you want to convert.
- Multiply that value by 0.003785411784.
- For example, 10 US Gallon × 0.003785411784 = 0.03785411784 Cubic Meter.
- Label the result as Cubic Meter (m3).
Relative Size Comparison
This chart shows the visual difference in size between exactly one US Gallon and one Cubic Meter.
About US Gallon and Cubic Meter
The US gallon is defined as 231 cubic inches, exactly 3.785411784 liters. US fuel prices, milk jugs, and paint cans are all per-gallon quantities. The cubic meter is the SI derived unit of volume — 1,000 liters. Construction (concrete, excavation), water utilities, and freight all bill by the cubic meter. One US Gallon equals 0.003785411784 Cubic Meter (1 gal = 0.003785411784 m3). US Gallon to Cubic Meter conversion comes up most often in US fuel prices and in US milk and beverage containers, typically when figures need restating for concrete and excavation quantities.
Precision and Rounding: US and imperial volume units share names but differ in size (an imperial gallon is about 20% larger than a US gallon), so confirm which system a figure uses before converting. Kitchen work tolerates rounding to the nearest milliliter or quarter-teaspoon; fuel, chemistry, and brewing need three or more decimal places.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 US Gallon equals 0.05678117676 Cubic Meter.
15 gal × 0.003785411784 = 0.05678117676 m3
FAQ
How do I convert US Gallon to Cubic Meter?
Multiply the US Gallon value by 0.003785411784 to get the equivalent value in Cubic Meter.
What is the formula for US Gallon to Cubic Meter?
The formula is m3 = gal × 0.003785411784.
How many Cubic Meter are in 1 US Gallon?
1 US Gallon equals 0.003785411784 Cubic Meter.
Can I convert Cubic Meter back to US Gallon?
Yes. 1 Cubic Meter equals 264.1720524 US Gallon, and the related converter can reverse the calculation.
What are common names for US Gallon and Cubic Meter?
US Gallon is shown as gal and may also be searched as gallons, us gallons. Cubic Meter is shown as m3 and may also be searched as cubic meters, m³.
Was this page helpful?
Let us know if this converter met your needs.