Volume Converter

How many liters is a 5-gallon bucket? How many fluid ounces in a 330 ml can? How much is one cup in milliliters? This volume converter answers all of that as you type, covering milliliters, liters, teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons and cubic meters in one place.

The factors follow US customary definitions: one US gallon is 3.78541 liters, one fluid ounce is 29.5735 ml, one teaspoon is 4.92892 ml and one tablespoon is 14.7868 ml. The cup uses the US legal definition of exactly 240 ml — the value on US nutrition labels — which sits between the customary cup (236.588 ml) and the metric cup (250 ml). Results are rounded only for display, so you never see floating-point noise.

Everything runs locally in your browser — no server call, no account, nothing to install, and the page keeps working offline once loaded. Both fields are live: type in either one and the other updates immediately, press the swap button to reverse the direction, and use the table of common values under the result for quick reference points.

It is a practical companion for cooking from American recipes in a metric kitchen, reading beverage and cosmetics labels, sizing aquariums and fuel tanks, and checking carry-on liquid limits — anywhere US customary and metric volumes collide.