Gallons (imperial) to Liters Converter
Convert gallons (imperial) to liters instantly. Exact factor: 1 imp gal = 4.546 L.
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Convert gallons (imperial) to liters
The exact conversion factor is 1 imp gal = 4.546 L. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the gallons (imperial) value by 4.546 to get liters.
Worked example
- Take 1 imp gal
- multiply by 4.546
- the result is 4.546 L
How to use it
- Enter your gallons (imperial)
- Read the liters result
- Check the factor line to verify by hand
Frequently asked questions
How many liters are in one gallons (imperial)?
Exactly 4.546 L, by the SI/NIST definition.
How do I convert liters back to gallons (imperial)?
Divide by 4.546 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.