Convert volume instantly — type a value, pick your units, and every other common unit updates live below. 100% free, runs entirely in your browser, no sign-up.
Every unit below updates live from the value you enter in the "From" field above.
Liquid volume gets messy fast because "gallon" and "pint" mean different amounts depending on where you are — a UK (imperial) gallon is about 20% larger than a US gallon, a difference that traces back to different historical standardization efforts in the 1800s. This converter uses US customary units for gallon/quart/pint/cup/fl oz, with a separate UK Gallon entry for the imperial measure.
Yes. It's completely free with no sign-up, and every conversion runs locally in your browser via JavaScript — the numbers you type are never sent to our servers.
Each unit uses its standard, internationally defined conversion factor, calculated in full precision and only rounded for display. Results are accurate to at least 6 significant figures.
This page intentionally covers the most commonly used volume units rather than an exhaustive engineering list. Use the suggestion button in the bottom-right corner of any page to request a unit and we'll consider adding it.
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