Quick answer: 1 Gallon (US) in Cubic Meter
1 gal equals 0.00378541 m³. To convert Gallon (US) to Cubic Meter, multiply by 0.00378541 using the free calculator above — no signup needed.
Volume & Capacity units
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About Volume & Capacity Converter
The Volume & Capacity Converter converts between 8 different units, including Liter, Milliliter, Cubic Meter, Gallon (US), Quart (US). The base unit is the Liter, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Liter = 1000 Milliliter, 0.001 Cubic Meter, 0.264172 Gallon (US).
Scale of this category: the smallest unit is the Milliliter (mL) and the largest is the Cubic Meter (m³).
Last updated: 2026-09-15
Volume & Capacity conversion factors
| Unit | Symbol | Value in Liter |
|---|---|---|
| Liter | L | 1 L = 1 L |
| Milliliter | mL | 1 mL = 0.001 L |
| Cubic Meter | m³ | 1 m³ = 1000 L |
| Gallon (US) | gal | 1 gal = 3.785412 L |
| Quart (US) | qt | 1 qt = 0.946353 L |
| Pint (US) | pt | 1 pt = 0.473176 L |
| Cup (US) | cup | 1 cup = 0.24 L |
| Fluid Ounce (US) | fl oz | 1 fl oz = 0.0295735 L |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 Gallon (US) in Cubic Meter?
- Multiply 1 by the conversion factor 0.00378541
- 1 Gallon (US) = 0.00378541 Cubic Meter
How much is 100 Gallon (US) in Cubic Meter?
- Multiply 100 by the conversion factor 0.00378541
- 100 Gallon (US) = 0.378541 Cubic Meter
How much is 1000 Gallon (US) in Cubic Meter?
- Multiply 1000 by the conversion factor 0.00378541
- 1000 Gallon (US) = 3.785412 Cubic Meter
Quick Conversion Reference Table
| Gallon (US) (gal) | Cubic Meter (m³) |
|---|---|
| 1 gal (Gallon (US)) | 0.00378541 m³ (Cubic Meter) |
| 2 gal (Gallon (US)) | 0.00757082 m³ (Cubic Meter) |
| 5 gal (Gallon (US)) | 0.0189271 m³ (Cubic Meter) |
| 10 gal (Gallon (US)) | 0.0378541 m³ (Cubic Meter) |
| 20 gal (Gallon (US)) | 0.0757082 m³ (Cubic Meter) |
| 50 gal (Gallon (US)) | 0.189271 m³ (Cubic Meter) |
| 100 gal (Gallon (US)) | 0.378541 m³ (Cubic Meter) |
| 500 gal (Gallon (US)) | 1.892706 m³ (Cubic Meter) |
| 1000 gal (Gallon (US)) | 3.785412 m³ (Cubic Meter) |
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FAQ
How much is 1 Gallon (US) in Cubic Meter?
1 Gallon (US) = 0.00378541 Cubic Meter.
How do I convert Gallon (US) to Cubic Meter?
Enter your value in Gallon (US) into the converter above and the result in Cubic Meter appears instantly. 1 gal equals 0.00378541 m³ — just multiply your value by 0.00378541.
What is the formula for Gallon (US) to Cubic Meter?
The formula is: value in Cubic Meter = value in Gallon (US) × 0.00378541. For example, 100 gal × 0.00378541 = 0.378541 m³.
Is this Gallon (US) to Cubic Meter converter free and accurate?
Yes. This Gallon (US) to Cubic Meter converter is 100% free, uses the exact international conversion factor (0.00378541), and works on any device with no signup.
How do I convert Cubic Meter back to Gallon (US)?
To convert back, divide by 0.00378541 (or multiply by 264.172052). You can also use our dedicated How Many Gallon (US) in 1 Cubic Meter? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Volume & Capacity units are supported?
This converter supports 8 units: Liter, Milliliter, Cubic Meter, Gallon (US), Quart (US), Pint (US), Cup (US), Fluid Ounce (US).