Volume Converter: Liters, Gallons, Cubic Feet, Cups
By Hesaplayıcı
The volume converter converts a volume between liters, milliliters, cubic meters, cubic feet, US and imperial gallons, pints, cups, fluid ounces and oil barrels. Enter the value and choose the two units. You get the result and the same volume in all sixteen units. The factors are exact: one US gallon is 3.785411784 liters.
Worked example: How many liters is 1 US gallon?
Result
3.79 L
In other units
- Milliliter
- 3,785.41 mL
- Cubic centimeter
- 3,785.41 cm³
- Cubic meter
- 0.00379 m³
- Cubic inch
- 231 in³
- Cubic foot
- 0.13 ft³
- Cubic yard
- 0.00495 yd³
- US fluid ounce
- 128 US fl oz
- US cup
- 16 US cup
- US pint
- 8 US pt
- US quart
- 4 US qt
- US gallon
- 1 US gal
- Oil barrel
- 0.02 bbl
- Imperial fluid ounce
- 133.23 UK fl oz
- Imperial pint
- 6.66 UK pt
- Imperial gallon
- 0.83 UK gal
Step by step
factor = from unit (L) / to unit (L)
factor = 3.785411784 / 1 = 3.79
Result
result = value × factor
result = 1 × 3.785411784 = 3.79 L
How to use
- Enter the Volume you want to convert.
- In From, choose the unit of the value.
- In To, choose the unit of the result and press Calculate.
Formula
result = value × factor, where factor = from unit in liters / to unit in liters.
The size of each unit in liters is exact by definition:
- 1 mL = 1 cm³ = 0.001 L; 1 m³ = 1,000 L
- 1 cubic inch = 0.016387064 L; 1 cubic foot = 28.316846592 L; 1 cubic yard = 27 cubic feet
- US: 1 gallon = 231 cubic inches = 3.785411784 L = 4 quarts = 8 pints = 16 cups = 128 fluid ounces
- Oil barrel = 42 US gallons = 158.987294928 L
- Imperial: 1 gallon = 4.54609 L = 8 pints = 160 fluid ounces
Worked example
The worked example on this page converts 1 US gallon to liters. The first step gives the factor between the two units; the second gives the result.
Limits
The cup is the US customary cup of 8 fluid ounces; the 240 mL nutrition-label cup and cooking spoons are not included. US dry measure and barrels other than the oil barrel are not included either. The calculator does not compute the volume of a shape. Negative volumes are not accepted. Results are rounded to 12 significant digits; the API and MCP return every digit.
Frequently Asked Questions
How many liters are in a gallon?
A US gallon is exactly 3.785411784 liters. An imperial (UK) gallon is exactly 4.54609 liters, about 20% more.
How many liters are in a barrel of oil?
An oil barrel is 42 US gallons, which is 158.987294928 liters, or about 159 liters.
How many milliliters are in a cup?
A US customary cup is 8 US fluid ounces, about 236.6 milliliters. The cup on US nutrition labels is rounded to 240 milliliters.
How many liters are in a cubic foot?
A cubic foot is exactly 28.316846592 liters, and a cubic meter is 1,000 liters.
Calculation rules
- Metric units: 1 L = 1 dm³ = 1,000 mL, 1 mL = 1 cm³, 1 m³ = 1,000 L.
- US liquid measure: 1 gallon = 231 cubic inches = 3.785411784 L; 1 gallon = 4 quarts = 8 pints = 16 cups = 128 fluid ounces. The cup is the US customary cup of 8 fluid ounces (about 236.6 mL), not the 240 mL cup of US nutrition labels.
- Imperial (UK) measure: 1 gallon = 4.54609 L = 8 pints = 160 fluid ounces. The imperial gallon is about 20% larger than the US gallon.
- The barrel is the oil barrel of 42 US gallons (158.987294928 L). Barrels for beer and other liquids differ.
- Results are rounded to 12 significant digits, which only removes tiny floating-point errors. The page may shorten numbers; the API and MCP return all 12 digits.