Quick Answer: Liters to Gallons (US)
One liter equals 0.264172052 gallons (US) (1 L = 0.264172052 gal).
Conversely, 1 gal = 3.78541178 L.
Formula: gal = L ÷ 3.785411784
Worked examples
- 1 L = 0.264172052 gal
- 2 L = 0.528344105 gal
- 5 L = 1.32086026 gal
Method and limitations
To convert liters to US gallons, multiply the liter value by 0.2641720524. Calculations use full-precision constants; displayed values are rounded to at most 9 significant figures. Results are rounded for display only. Full precision is kept internally, so long chains of conversions do not accumulate rounding error. Where US customary and imperial units share a name (for example fluid ounces and gallons), this page uses the US customary definition and says so explicitly.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
To convert liters to US gallons, multiply the liter value by 0.2641720524.
Complete Guide to Liters to Gallons (US) Conversion
What is a Liters?
A liter (L) is the standard metric unit for measuring liquid volume, equal to 1,000 mL or 1 cubic decimeter.
What is a Gallons (US)?
A US gallon (gal) is a unit of volume used primarily in the United States, equal to 128 fluid ounces or 3.785 liters.
How the Conversion Works
Multiplying by 0.2641720524 converts liters to gallons because one gallon equals exactly 3.785411784 liters.
Why This Conversion Matters
This conversion helps when buying US products, understanding American recipes, or comparing vehicle fuel tank capacities.
Step-by-Step Conversion Guide
Follow these steps to convert liters to gallons (us) manually:
Start with your value in liters
Example: You want to convert 5 L
Apply the conversion formula
Use the formula: gal = L ÷ 3.785411784
Calculate the result
5 L = 1.3209 gal
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
To convert liters to US gallons, multiply the liter value by 0.2641720524.
Common Conversions
| Liters (L) | Gallons (US) (gal) | Gallons (US) → Liters |
|---|---|---|
| 1 L | 0.264172 | 1 gal = 3.78541 L |
| 2 L | 0.528344 | 2 gal = 7.57082 L |
| 5 L | 1.32086 | 5 gal = 18.9271 L |
| 10 L | 2.64172 | 10 gal = 37.8541 L |
| 20 L | 5.28344 | 20 gal = 75.7082 L |
| 50 L | 13.2086 | 50 gal = 189.271 L |
| 100 L | 26.4172 | 100 gal = 378.541 L |
| 200 L | 52.8344 | 200 gal = 757.082 L |
| 500 L | 132.086 | 500 gal = 1,892.71 L |
| 1000 L | 264.172 | 1000 gal = 3,785.41 L |
Did You Know?
The liter was originally defined as the volume of 1 kilogram of water at 4°C, creating a direct link between volume and weight measurements.
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Popular Liters to Gallons (US) Conversions
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When You'll Need This Conversion
Fuel Comparison
Compare fuel tank sizes and prices when traveling from metric countries to the US.
Product Sizing
Understand US product sizes when buying paint, cleaning supplies, or beverages.
Pro Tips for Accurate Conversions
Divide by 4 for quick estimates
10 liters ÷ 4 = 2.5 gallons (actual: 2.64). This underestimates by about 5%.
Remember: 1 gallon ≈ 4 liters
So roughly 1 liter ≈ ¼ gallon. Use this for quick mental math.
Frequently Asked Questions
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Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.