Gallons to Litres Converter
Convert gallons to litres instantly with formula and worked examples.
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Convert US gallons (gal) to litres (L) instantly. This is one of the most commonly needed conversions in the volume category, required in engineering, science, and everyday life across different measurement systems.
Understanding gal and L
Us gallons and litres are both units of volume. gal is part of the imperial system, while L belongs to the metric system. The exact conversion factor is 3.78541 (0.264172 in reverse).
When You Need This Conversion
This conversion is needed when working with international specifications, reading metric measurements in a imperial country, or using equipment calibrated in different units.
How to Use This Calculator
- Open the Unit Converter
Navigate to the converter and select '{cat.title()}' from the category dropdown.
- Select gal as source
Choose US gallons as your starting unit.
- Enter your value in gal
Type the number you want to convert.
- Select L as target
Choose litres to see the result instantly.
- Read the result
The converted value appears immediately with full precision.
Applications
Fuel Economy
15 gal tank = 56.78 L. Convert US vehicle specs for Australian buyers.
Aquariums
55 gal aquarium = 208.2 L. Tank sizes quoted differently worldwide.
Paint Coverage
5 gal paint = 18.93 L. US paint sold by gallon; AU by litre.
Frequently Asked Questions
How do you convert US gallons to litres?
Multiply by 3.78541. 10 US gal = 37.85 L.
What about imperial gallons?
1 imp gal = 4.54609 L. Multiply imperial gallons by 4.546.
How many US gallons in 100 litres?
100 รท 3.78541 = 26.42 US gal.