Why "US" is in the name
US customary and Imperial volume units use different definitions for gallons, quarts, pints, and fluid ounces. A US gallon is 231 cubic inches, or exactly 3.785411784 liters, while an Imperial gallon is approximately 4.546 liters.
This converter uses US customary definitions throughout. If a recipe or measurement specifies Imperial units, use our UK Volume Converter instead.
Exact conversion factors
| Unit | Equal to |
|---|---|
| 1 cubic meter (m³) | 1,000 liters |
| 1 cubic centimeter (cm³) | 1 milliliter |
| 1 liter | 1,000 milliliters |
| 1 gallon (US) | 3.785411784 liters |
| 1 quart (US) | 1/4 gallon — 0.946352946 liters |
| 1 pint (US) | 1/8 gallon — 0.473176473 liters |
| 1 cup (US) | 1/16 gallon — 236.5882365 mL |
| 1 fluid ounce (US) | 1/128 gallon — 29.5735295625 mL |
| 1 cubic foot | 1,728 cubic inches (12³) |
| 1 cubic yard | 27 cubic feet |
The conversion factors below are based on the defined relationships between these units. Values shown in decimal form are provided to the precision needed for practical conversion.
Frequently asked questions
How many liters are in a US gallon?
Exactly 3.785411784 liters.
Is a US gallon the same as an Imperial gallon?
No. A US gallon is 3.785411784 liters, while an Imperial gallon is approximately 4.546 liters. This converter uses US customary units.
How many milliliters are in a cubic centimeter?
Exactly 1 mL. One cubic centimeter (cm³) and one milliliter (mL) represent the same volume.
How many cups are in a US gallon?
There are 16 US customary cups in 1 US gallon.