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

Gallons to liters

Convert 2 US gallons of water into liters.

Volume
2
From unit
US gallons (gal)
To unit
Liters (L)
Converted volume
7.5708 L
Conversion
2 us_gallon = 7.5708 liter

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How It Works

Formula

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

Variables, symbols and units

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)
Calculation method explained

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.

References and source material

Examples

Gallons to liters2 · US gallons (gal) → 7.5708 L

Convert 2 US gallons of water into liters.

Volume
2
From unit
US gallons (gal)
To unit
Liters (L)
Converted volume
7.5708 L
Recipe milliliters to cups250 · Milliliters (mL) → 1.0567 US cup

Convert 250 mL of milk into US cups.

Volume
250
From unit
Milliliters (mL)
To unit
US cups (cup)
Converted volume
1.0567 US cup
Cubic meters to gallons1 · Cubic meters (m³) → 264.1721 US gal

Convert a 1 m³ tank into US gallons.

Volume
1
From unit
Cubic meters (m³)
To unit
US gallons (gal)
Converted volume
264.1721 US gal

Frequently Asked Questions

What 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.
Why 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.
Are 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.
How 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.
How 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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