Convert liquid volume between metric and both US and imperial customary units. This tool covers milliliters, liters, cubic meters, US gallons, US quarts, US pints, US cups, US fluid ounces, and imperial gallons, so it works whether your recipe, fuel figure, or lab measurement came from America, Britain, or a metric country. US and imperial gallons are genuinely different sizes, and this converter uses the exact defined values for each so you do not mix them up. Select your from and to units, type a number, and the result updates live. Everything is computed locally in your browser, meaning it is fast, private, and continues to work offline after the first load.