Volume Converter

Convert volume between litres, gallons, millilitres, cups, and more.

Loading tool…
  • 🔒 Files never leave your device
  • ⚡ Converted in your browser
  • ✅ No account required

Volume Converter: The Complete Guide

Convert volume instantly. Switch between litres, millilitres, gallons (US and UK), cups, pints, quarts, and fluid ounces, and see the conversion rate in both directions.

Who the Volume Converter is for

Cooks, brewers, and anyone converting liquid volume between metric and US/UK units.

How to use the Volume Converter

  1. Type your values into the fields above — pick your currency or units where the calculator offers them.
  2. Results update automatically as you type; there's no submit button and nothing is sent to a server.
  3. Adjust any input to compare scenarios, then copy the result with a single click.

How it works

Each unit has a fixed size in litres. The value is converted to litres, then to the target unit: result = value × (from-unit litres) ÷ (to-unit litres).

Features

  • Metric, US & UK units
  • Cooking measures
  • Two-way conversion rate
  • Instant result

Volume units across systems

Volume is where unit confusion bites hardest: a US gallon (3.785 L) differs from a UK gallon (4.546 L), and cups and ounces vary too. This converter uses US customary measures for cups, pints, and quarts, plus both gallon standards, so you can convert recipes and quantities accurately.

Frequently Asked Questions

Is a US gallon the same as a UK gallon?

No — a US gallon is about 3.785 litres, while a UK (imperial) gallon is about 4.546 litres. The converter includes both.

How many millilitres in a cup?

A US cup is about 236.6 millilitres. Note that metric and UK cups differ slightly.

Is this calculator free and private?

Yes. It's completely free with no signup, and every calculation runs locally in your browser, so your numbers never leave your device.