Liters to US Gallons Converter

This tool converts volume from liters (L) to US liquid gallons (gal) using the exact legal factor. Abbreviations: L, mL, gal. Systems: SI (liter, milliliter) and US customary (US gallon). The computation is reproducible, unit-consistent, and cites the official US definition.

Liters (L) to US Gallons (gal) Converter

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Liters (L)

Result in US Gallons (gal)

gal to L

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How to use

Type the value in liters.
Optionally set the number of decimal places.
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Definitions of measurement units

Liter (L, SI) — Exactly one cubic decimeter. Relationships: 1 L = 1000 milliliters (mL) and 1 L = 0.001 cubic meter (m³). In US customary terms for this converter: 1 L = 0.264172052 US gal. The symbol L is preferred; mL is the thousandth part.

US liquid gallon (gal, US customary) — Exactly 231 cubic inches. With the inch defined as exactly 2.54 centimeters, 1 US gal = 3.785411784 L. In SI terms for this converter: 1 US gal = 3.785411784 L = 3785.411784 mL.

Conversion formula

Gallons from liters: gal = L ÷ 3.785411784. Inverse for reference: L = gal × 3.785411784. Source: NIST Handbook 44, Appendix C (1 US gallon = 231 in³; 1 inch = 2.54 cm exact). NIST HB 44 Appendix C