Gallon (US) to Fluid Ounce (US) Converter
Convertisseur de Volume Gratuit, Convertissez Litres, Gallons, Onces Liquides, Tasses et Millilitres
Gallon (US)
- Symbol
- gal
- System
- Metric/Imperial
- Dimension
- Various
Fluid Ounce (US)
- Symbol
- fl oz
- System
- Metric/Imperial
- Dimension
- Various
Quick Reference Table
| Gallon (US) | Fluid Ounce (US) | Fluid Ounce (US) | Gallon (US) |
|---|---|---|---|
| 1 | 128.0000676281 | 1 | 0.0078124959 |
| 2 | 256.0001352562 | 2 | 0.0156249917 |
| 3 | 384.0002028843 | 3 | 0.0234374876 |
| 5 | 640.0003381406 | 5 | 0.0390624794 |
| 10 | 1280.0006762811 | 10 | 0.0781249587 |
| 25 | 3200.0016907028 | 25 | 0.1953123968 |
| 50 | 6400.0033814057 | 50 | 0.3906247936 |
| 100 | 12800.0067628113 | 100 | 0.7812495872 |
| 500 | 64000.0338140565 | 500 | 3.9062479362 |
| 1000 | 128000.067628113 | 1000 | 7.8124958723 |
Conversion Formula
Fluid Ounce (US) = Gallon (US) × 128.0000676281
Gallon (US) = Fluid Ounce (US) × 0.0078124959
Factors are from BIPM SI brochure and NIST SP 811, stored unrounded and computed via a base unit. Reverse factor is 1 ÷ 128.0000676281.
How to convert Gallon (US) to Fluid Ounce (US)
Multiply the value in gallon (us) by 128.0000676281 to get fluid ounce (us). For example, 5 Gallon (US) = 640.0003381406 Fluid Ounce (US). All results in the volume 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 128. too early — keep full precision until the final display. For volume, always verify critical calculations (medicine, engineering) with a second source.
FAQ
- How many Fluid Ounce (US) in 1 Gallon (US)?
- 1 Gallon (US) = 128.0000676281 Fluid Ounce (US).
- How many Gallon (US) in 1 Fluid Ounce (US)?
- 1 Fluid Ounce (US) = 0.0078124959 Gallon (US).
- What is the source?
- BIPM/NIST via OmniConverter base-unit engine. Source table and formula above are exact.
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