Gallon (US) to Quart (US) Converter
無料体積換算ツール, リットル、ガロン、液量オンス、カップ、ミリリットルを瞬時に換算
1Gallon (US)=3.9999978866Quart (US)
1 Quart (US) = 0.2500001321 Gallon (US)
Gallon (US)
- Symbol
- gal
- System
- Metric/Imperial
- Dimension
- Various
Quart (US)
- Symbol
- qt
- System
- Metric/Imperial
- Dimension
- Various
Quick Reference Table
| Gallon (US) | Quart (US) | Quart (US) | Gallon (US) |
|---|---|---|---|
| 1 | 3.9999978866 | 1 | 0.2500001321 |
| 2 | 7.9999957732 | 2 | 0.5000002642 |
| 3 | 11.9999936599 | 3 | 0.7500003963 |
| 5 | 19.9999894331 | 5 | 1.2500006604 |
| 10 | 39.9999788662 | 10 | 2.5000013209 |
| 25 | 99.9999471656 | 25 | 6.2500033022 |
| 50 | 199.9998943312 | 50 | 12.5000066043 |
| 100 | 399.9997886624 | 100 | 25.0000132086 |
| 500 | 1999.9989433119 | 500 | 125.000066043 |
| 1000 | 3999.9978866237 | 1000 | 250.0001320861 |
Conversion Formula
Quart (US) = Gallon (US) × 3.9999978866
Gallon (US) = Quart (US) × 0.2500001321
Factors are from BIPM SI brochure and NIST SP 811, stored unrounded and computed via a base unit. Reverse factor is 1 ÷ 3.9999978866.
How to convert Gallon (US) to Quart (US)
Multiply the value in gallon (us) by 3.9999978866 to get quart (us). For example, 5 Gallon (US) = 19.9999894331 Quart (US). All results in the 体積 converter update instantly as you type, so you can see every unit at once without manual math.
Common mistakes
Do not round the factor to 3.99 too early — keep full precision until the final display. For 体積, always verify critical calculations (medicine, engineering) with a second source.
FAQ
- How many Quart (US) in 1 Gallon (US)?
- 1 Gallon (US) = 3.9999978866 Quart (US).
- How many Gallon (US) in 1 Quart (US)?
- 1 Quart (US) = 0.2500001321 Gallon (US).
- What is the source?
- BIPM/NIST via OmniConverter base-unit engine. Source table and formula above are exact.
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