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Volume

Gallons to Liters Converter - Free Online

Convert US gallons to liters instantly with this free gallons to liters converter.Enter any gallon amount for fuel, paint, pool chemicals, or recipes and get an accurate liter result right away.

Inputs

Enter your values below. Results update when you calculate.

About Gallons → Liters

Convert US gallons to liters instantly with this free gallons to liters converter.Enter any gallon amount for fuel, paint, pool chemicals, or recipes and get an accurate liter result right away.

Specify US gallons unless form offers UK imperial.

Gallons in, liters out.

How to use this tool

Type gallons. Calculate for liters.

Formula & methodology

This gallons to liters converter - free online applies the standard relationship below. Intermediate values are kept at full precision; only the displayed result is rounded.

L = US gal x 3.785411784

Tips for accurate results

  • 1 US gallon is about 3.79 L.
  • Reverse: liters-to-gallons.
  • Fuel tank capacity labels may be approximate.
  • Verify spill kit volumes after conversion.

Frequently asked questions

5 gallons in liters?

About 18.93 L for US gallons.

UK gallon?

Use liters-to-gallons tool noting imperial if supported.

Free?

Yes.

Weight?

Water approx 1 kg per liter; other fluids differ.

Common values: gallons to liters

Tap any value for the exact answer and the step-by-step math.

Related tools

More calculators in Volume.

Volume Liters → Gallons Liters to US and UK gallons. Volume ml → Cups Milliliters to US cups. Volume Cups → ml US cups to milliliters.