How do you easily remember how to convert litres to gallons?

Converting litres to gallons is simple if you remember this key rule:

1 litre ≈ 0.264 gallons (US)

For quick mental math:

• Multiply litres by 0.25 (or divide by 4) to get a rough estimate in gallons.

Example:
5 litres × 0.25 = 1.25 gallons (approx.)

Need the reverse? Multiply gallons by 3.785 to convert to litres. With practice, this conversion becomes second nature!