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Gallon (US) to Liter

Convert gallon (gal) to liter (L) — with the exact factor, a quick-reference table and a free converter that works offline.

1 gal = 3.785412 L

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Conversion table

Gallon (gal)Liter (L)
1 gal3.785412 L
2 gal7.570824 L
5 gal18.92706 L
10 gal37.85412 L
20 gal75.70824 L
50 gal189.2706 L
100 gal378.5412 L
500 gal1,892.706 L

How the conversion works

Both units measure volume. One gallon equals exactly 3.785412 L, so multiply by that factor to convert. US liquid gallon. ~17% smaller than the UK gallon.

FAQ

How many liters in a gallon?

1 gal = 3.785412 L.

How do I convert gallon to liter?

Multiply the gallon value by 3.785412. For example, 10 gal × 3.785412 = 37.85412 L.

Where does the factor come from?

The conversion factor is defined in NIST SP 811; both units are volume units converted through liter.

Related conversions

Liter to Gallon (US) Cup (US) to Milliliter Milliliter to Cup (US) Liter to Milliliter

Conversion factors: NIST SP 811. Computed by the same engine that powers the app.

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