Gallons to Fluid Ounces: 1 gal equals 128 fl oz. To convert gallons to fluid ounces, multiply by 128 (fl oz = gal × 128). For example, 10 gal = 1280 fl oz.
How to Convert Gallons to Fluid Ounces
To convert from gallons to fluid ounces, multiply the value by 128. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Gallons to Fluid Ounces:
fl oz = gal × 128 - Fluid Ounces to Gallons:
gal = fl oz ÷ 128
Gallons to Fluid Ounces Conversion Chart
| Gallons (gal) | Fluid Ounces (fl oz) |
|---|---|
| 0.1 | 12.8 |
| 0.25 | 32 |
| 0.5 | 64 |
| 1 | 128 |
| 2 | 256 |
| 3 | 384 |
| 5 | 640 |
| 10 | 1280 |
| 20 | 2560 |
| 25 | 3200 |
| 50 | 6400 |
| 100 | 12800 |
| 250 | 32000 |
| 1000 | 128000 |
Understanding the Units
What is a Gallon?
The US liquid gallon equals exactly 3.785411784 liters; the imperial (UK) gallon equals 4.54609 liters.
From the Old Northern French galun, originally a wine measure.
Common contexts: fuel, milk, paint.
What is a Fluid Ounce?
The US fluid ounce equals exactly 29.5735295625 milliliters; the imperial fluid ounce is 28.4130625 milliliters.
Common contexts: beverages, cooking (US).
Real-World Reference Points
| Item | Gallons (gal) | Fluid Ounces (fl oz) |
|---|---|---|
| A milk jug (US) | 1 | 128 |
| Average car gas tank (US) | 14 | 1792 |