Volume Converter
Convert through one liter baseline and round only the displayed value.
01 / CONVERT VOLUME
CONVERTED VALUE
1 US gal = 3.78541178 L
Conversion constant: 1 US gal = 3.785411784000 L
- Converted value
- 3.78541178 L
- Liter baseline
- 3.78541178 L
Calculation trace
- 1 gal_us → liters3.78541178 LNormalize to base unit
- 3.785412 L → l3.78541178 lConvert to target unit
| SOURCE | RELATION | CONVERTED |
|---|---|---|
| 1 US gal | = | 3.78541178 L |
| 5 US gal | = | 18.92705892 L |
| 10 US gal | = | 37.85411784 L |
| 25 US gal | = | 94.6352946 L |
| 100 US gal | = | 378.5411784 L |
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How it works
Every volume is converted to litres with a fixed factor, then divided by the target unit’s litres-per-unit factor. The implementation uses 1 m³ = 1,000 L, 1 US gallon = 3.785411784 L, 1 imperial gallon = 4.54609 L and 1 US fluid ounce = 0.0295735295625 L.
Assumptions & limits
- Uses defined conversion factors for the listed units; US and imperial gallons are treated as distinct units.
- Converts geometric volume only and does not account for temperature-dependent expansion or fluid density.
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FAQ
- Are US and imperial gallons the same?
- No. A US liquid gallon is 3.785411784 litres, while an imperial gallon is 4.54609 litres.
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Related calculators
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SOURCES
- Bureau International des Poids et Mesures (BIPM)The International System of Units (SI), 9th edition ↗
SI unit of volume (cubic metre) and the litre (1 L = 0.001 m³)
Accessed 2026-08-19
- National Institute of Standards and Technology (NIST)Guide for the Use of the International System of Units (SI) — NIST Special Publication 811 ↗
Appendix B exact volume conversion factors (US gallon = 3.785411784 L, fluid ounce, cubic foot)
Accessed 2026-08-19