Unit Conversions
Basic

Liters to US Gallons

Convert liters to US gallons.

Formula

gal=L×0.264172\text{gal} = \text{L} \times 0.264172

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Example

10 L × 0.264172 = 2.64 US gal.

How it works

This formula converts a volume measured in liters into US gallons by multiplying by the conversion factor 0.264172. That factor exists because 1 liter is exactly equal to about 0.264172 US gallons, based on the defined sizes of the metric and US customary units. In other words, it tells you how many US gallons fit into each liter.

When to use it

Use this when you need to change a liquid volume from metric units into US units, such as in cooking, fuel measurements, chemistry, or shipping. It is especially useful when instructions, labels, or data are given in liters but a US gallon value is needed.

Worked example, step by step

Convert 18.5 L to US gallons Use the formula: gal = L × 0.264172 Substitute the value: gal = 18.5 × 0.264172 Calculate: gal = 4.890182 Round to two decimals: 4.89 US gal

Common mistakes to avoid

  • Using the UK/imperial gallon factor instead of the US gallon factor
  • Multiplying by 3.78541 instead of 0.264172 when converting liters to gallons
  • Forgetting to round the final answer to a sensible number of decimal places

Did You Know?

The US and UK gallons differ: a UK gallon is about 20% larger, a lasting source of confusion.

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Reviewed & maintained by the FormulaWon editorial teamLast reviewed September 2026