Gallons to Liters Converter
How to convert gallons to liters
Using US customary definitions, 1 gallon = 3.785411784 liters. Multiply the starting value by 3.785411784 to get the result in liters; results are rounded to up to 6 decimal places.
Quick reference table
| US gallons (gal) | Liters (L) |
|---|---|
| 1 | 3.785412 |
| 5 | 18.927059 |
| 10 | 37.854118 |
| 25 | 94.635295 |
| 50 | 189.270589 |
| 100 | 378.541178 |
Frequently Asked Questions
How many liters are in 1 gallon?
1 gallon (US) = 3.785411784 liters. Other values use the same proportional conversion.
Does the gallon-to-liters conversion vary by country?
This page uses US customary definitions: 1 tbsp ≈ 14.79 mL, 1 tsp ≈ 4.93 mL, 1 fl oz ≈ 29.57 mL, 1 pint ≈ 473 mL, 1 quart ≈ 0.946 L and 1 gallon ≈ 3.785 L. UK imperial units (for example 1 pint ≈ 568 mL) and spoon sizes in other countries differ slightly, so check the recipe source.
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Why use a volume converter?
Recipes, drink formulas, product labels and technical specifications often use different volume units. This tool puts US teaspoons, tablespoons, cups, pints, quarts and gallons alongside milliliters, liters and cubic units for quick checks.
tsp, tbsp, fl oz, cup, pt, qt and gal use US customary liquid definitions. One US cup is about 236.588 ml, while a metric recipe cup is commonly 250 ml, so check the recipe source.
Common reference values
- 1 L = 1,000 ml
- 1 m³ = 1,000 L
- 1 US tbsp is about 14.7868 ml
- 1 US gal is about 3.78541 L
Gallons to Liters Converter
Useful for US fuel prices per gallon, paint cans, water jugs and aquarium tanks. This page uses the US gallon (about 3.785 L); a UK imperial gallon is about 4.546 L.