US gallons to Litres
1 US gallon = 3.7854 litres · 1 L = 0.26417 gal (US)
1 US gallon = 3.7854 litres
How it’s calculated
L = gal (US) × 3.785411784
- Multiply the value in US gallons by 3.785411784.
- To go back, divide by 3.785411784 (or multiply by 0.2641720524).
- 1 gal (US) = 3.785411784 L · 1 L = 0.2641720524 gal (US)
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 gal (US) = 0.003785411784 m³ and 1 L = 0.001 m³, so 1 gal (US) = 3.785411784 L. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).
Multiply by the factor written as a fraction
Put gal (US) in the denominator so it cancels, leaving L.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 3.7854 L
1 gal (US) in other units
Batch convert gal (US) → L
- 1 gal (US) = 3.7854 L
- 5 gal (US) = 18.927 L
- 10 gal (US) = 37.854 L
- 25 gal (US) = 94.635 L
Quick examples
- 1 US gallon = 3.7854 litres
- 5 US gallons = 18.927 litres
- 10 US gallons = 37.854 litres
- 25 US gallons = 94.635 litres
- 100 US gallons = 378.54 litres
About these units
US gallon (gal (US))
US customary
Exactly 231 in³ = 3.785 411 784 L.
1 gal (US) = 0.003785411784 m³
Source: NIST SP 811 / Handbook 44
Litre (L)
metric (non-SI)
Exactly 1 dm³ = 0.001 m³.
1 L = 0.001 m³
Source: BIPM SI Brochure (9th ed.)
US gallons to litres conversion table
| US gallons (gal (US)) | Litres (L) |
|---|---|
| 0.1 gal (US) | 0.37854 L |
| 0.5 gal (US) | 1.8927 L |
| 1 gal (US) | 3.7854 L |
| 2 gal (US) | 7.5708 L |
| 3 gal (US) | 11.356 L |
| 4 gal (US) | 15.142 L |
| 5 gal (US) | 18.927 L |
| 6 gal (US) | 22.712 L |
| 7 gal (US) | 26.498 L |
| 8 gal (US) | 30.283 L |
| 9 gal (US) | 34.069 L |
| 10 gal (US) | 37.854 L |
| 15 gal (US) | 56.781 L |
| 20 gal (US) | 75.708 L |
| 25 gal (US) | 94.635 L |
| 30 gal (US) | 113.56 L |
| 40 gal (US) | 151.42 L |
| 50 gal (US) | 189.27 L |
| 75 gal (US) | 283.91 L |
| 100 gal (US) | 378.54 L |
| 250 gal (US) | 946.35 L |
| 500 gal (US) | 1,892.7 L |
| 1,000 gal (US) | 3,785.4 L |
Related conversions
Frequently asked questions
How do I convert US gallons to litres?
Use L = gal (US) × 3.785411784. Multiply the value in US gallons by 3.785411784.
How many litres are in 1 US gallon?
1 US gallon (gal (US)) equals 3.7854 litres (L); more precisely 3.785411784.
How many US gallons are in 1 litre?
1 litre (L) equals 0.26417 US gallons (gal (US)); more precisely 0.2641720524.
What is 10 gal (US) in L?
10 US gallons = 37.854 litres.
Is the US gallon a US or a UK unit?
This converter uses the US customary US gallon. Exactly 231 in³ = 3.785 411 784 L. US and UK units with the same name can differ, so check which one your source uses.
What is a US gallon?
Exactly 231 in³ = 3.785 411 784 L.
What is a litre?
Exactly 1 dm³ = 0.001 m³.
Formula: L = gal (US) × 3.785411784. Factors last reviewed 2026-10-27.