Volume Converter
Convert cooking and everyday volume units, from milliliters to gallons.
1 mL =
0.001 L
How to use
- Type the value to convert — decimals are fine.
- Pick the current unit on the left and the target unit on the right. The middle button swaps direction.
- The result updates as you type. Check the conversion table and formula below, too.
Frequently asked questions
How accurate are the results?+
Calculations use the internationally standardized (SI) definitions; only the display is rounded to about six significant digits. That's plenty for everyday, school and work use.
How many mL is a cup in recipes?+
A US cup is about 236.6 mL. Metric cups used in some countries are 250 mL, and Korean measuring cups are 200 mL — this converter uses the US definition.
Is a fluid ounce the same as a weight ounce?+
No. The fluid ounce (≈29.57 mL) measures volume; the ounce (28.35 g) measures weight. Beverage labels use fluid ounces.
Does it need a fast connection?+
No. The math runs instantly inside your browser with no server round-trip — it even works offline once the page is open.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
Decoding recipe measurements
American recipes measure in cups, fluid ounces and pints; most of the world uses mL and liters. Anchors: 1 cup ≈ 236 mL, 1 fl oz ≈ 29.6 mL, 1 gallon ≈ 3.79 L.
Beware imperial (UK) units sharing names with US ones at different sizes — a UK pint is 568 mL vs the US 473 mL. This converter uses the more common US definitions.
How this converter calculates
Every unit is converted to liters first, then divided into the target unit, using the exact defined value of the US gallon (3.785411784 L).