Enter Value and Choose Unit
Results
Liters (L)
1.0000
US Gallons (gal)
0.2642
Imperial Gallons (gal)
0.2200
US conversion: L × 0.2641720524 = US gal
Imperial conversion: L × 0.2199692483 = Imp gal
Reverse: gal × 3.785411784 = L (US) • gal × 4.54609 = L (Imperial)
Quick Table
Generate a small reference table for evenly spaced values. Export to CSV or print.
| Input | Input Unit | Liters (L) | US Gallons (gal) | Imperial Gallons (gal) |
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About This Converter
This tool converts seamlessly among liters, US gallons, and Imperial gallons with precise constants. Choose your source unit, set display decimals, and pick a rounding mode to match your reporting needs.
- US 1 gal = 3.785411784 L
- Imperial 1 gal = 4.54609 L
Differences arise from historical definitions: the US gallon is based on 231 cubic inches; the Imperial gallon derives from 10 lb of water at 62°F (approx.).
Formulas
US gal = L ÷ 3.785411784
Imp gal = L ÷ 4.54609
L = US gal × 3.785411784
L = Imp gal × 4.54609
All displayed values honor your selected decimals and rounding mode; calculations retain full precision internally.
FAQs
The US liquid gallon equals 3.785411784 liters, while the Imperial gallon equals 4.54609 liters. Imperial gallons are larger, so a given volume in liters produces fewer Imperial gallons than US gallons.
Yes. Choose the unit of your input (liters, US gallons, or Imperial gallons). The tool instantly calculates the other two using precise constants and your chosen rounding mode.
Half up is a common default for reporting. Truncate chops off extra decimals. Bankers rounding reduces bias by rounding .5 to the nearest even digit. Pick the policy your organization prefers.
For everyday use, 2–3 decimals are typical. Scientific and engineering contexts may need more. The calculator lets you display up to 12 decimals while maintaining full precision internally.
The constants themselves are fixed definitions. In practice, extreme temperatures can change a liquid’s volume slightly due to thermal expansion, but the standard liter and gallon definitions remain the same.
This tool focuses on liquid measure. Dry gallons exist in certain contexts, but their usage is rare and definitions differ. For most applications, use the liquid gallon conversions provided here.
Yes. Use the Share Link button to copy a URL embedding your value, source unit, decimals, and rounding choice so others see the same configuration and results instantly.
Differences usually come from rounding at different steps or using fewer significant figures. Ensure you apply the same constants and only round at the end for best agreement.