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Conversion Calculators

Volume Converter

Verified formula Updated Jun 2026 Private — runs on your device

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Verified formula Private

Litres (L)

3.7854

Millilitres (mL)
3,785.41
US gallons
1.0000
UK gallons
0.8327

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Volume Converter

The Volume Converter works out your litres (l), along with 3 related figures in an instant. Enter volume and from unit and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the volume.
  2. Choose the from unit.
  3. Read off your litres (l), together with millilitres (ml), us gallons and uk gallons — the calculator updates automatically, with no button to press.

Worked example

For example, with volume of 1 and from unit of US gallons, the litres (l) is 3.7854.

Inputs used
Volume 1
From unit US gallons
Results
Litres (L) 3.7854
Millilitres (mL) 3,785.41
US gallons 1.0000
UK gallons 0.8327

Results are estimates for educational use, not professional advice.

Key terms explained

Volume
The amount of three-dimensional space an object occupies, measured in cubic units.

Frequently asked questions

One US gallon equals about 3.7854 litres. A UK (imperial) gallon is larger at about 4.5461 litres.

They are different sizes. A US gallon is about 3.785 litres while a UK gallon is about 4.546 litres, so they are not interchangeable.

There are 1000 millilitres in one litre.

A US customary cup is about 236.6 millilitres, just under a quarter of a litre.

Enter the volume. Choose the from unit. Read off your litres (l), together with millilitres (ml), us gallons and uk gallons — the calculator updates automatically, with no button to press.

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