CalcLibrary

Volume Converter

Convert between liters, milliliters, cubic meters, US gallons, cups, fluid ounces, and Imperial gallons. Built for recipes, fuel, container sizes, and US/UK liquid measures.

Examples

Convert 2 US gallons of water into liters.

Converted volume
7.5708 L
Conversion
2 us_gallon = 7.5708 liter

The result is larger because the target unit is smaller. One source unit holds about 3.79 target units.

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Examples

How It Works

Formula

r=v×ffromftor = v \times \dfrac{f_{\text{from}}}{f_{\text{to}}}

Variables

vv

Input value

rr

Converted volume

ffromf_{\text{from}}

Conversion factor of the source unit (liters per unit)(L)

ftof_{\text{to}}

Conversion factor of the target unit (liters per unit)(L)

The calculator converts your value into liters as a base unit, then converts from liters into the target unit. This keeps every metric, US, and Imperial volume pair consistent.

Reference factors used by the calculator (liters per unit):

  • 1 L = 1 L
  • 1 mL = 0.001 L
  • 1 m³ = 1000 L
  • 1 cm³ = 0.001 L (= 1 mL)
  • 1 ft³ = 28.316846592 L
  • 1 in³ = 0.016387064 L
  • 1 US gallon = 3.785411784 L
  • 1 US quart = 0.946352946 L
  • 1 US pint = 0.473176473 L
  • 1 US cup = 0.2365882365 L
  • 1 US fluid ounce = 0.0295735296 L
  • 1 US tablespoon = 0.01478676478 L
  • 1 US teaspoon = 0.00492892159 L
  • 1 Imperial gallon = 4.54609 L
  • 1 Imperial pint = 0.56826125 L

The value is first multiplied by the source factor to get liters, then divided by the target factor to land in the chosen unit.

Frequently Asked Questions

01What is the difference between a US gallon and an Imperial gallon?
1 US gallon equals about 3.785 liters, while 1 Imperial (UK) gallon equals about 4.546 liters. The Imperial gallon is roughly 20% larger, so always pick the right one for the recipe or product label.
02Why do US and UK fluid ounces differ?
1 US fluid ounce is about 29.57 mL, while 1 UK (Imperial) fluid ounce is about 28.41 mL. The two systems were defined separately, so the same name covers slightly different volumes.
03Are milliliters and cubic centimeters the same thing?
Yes. 1 mL equals exactly 1 cm³ by definition. Most cooking and medical contexts use mL; engineering and physics often use cm³.
04How do common cooking conversions work?
1 US cup is about 236.6 mL, 1 US tablespoon is about 14.79 mL, and 1 US teaspoon is about 4.93 mL. This calculator uses those exact factors so recipe scaling stays accurate.
05How precise should I be when converting volumes?
For cooking, 2–3 significant figures are usually enough. For lab work, fuel ordering, or construction estimates, use the full 4 decimal places shown here to avoid compounding rounding errors.

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