1 gal to fl oz
1 US gallon in US fluid ounces
1 gal = 128 fl oz
fl oz = gal × 128
1 US gallon is 128 US fluid ounces. To get there, multiply by 128.
Values either side
| US gallons | US fluid ounces |
|---|---|
| 0.5 gal | 64 |
| 1 gal ← | 128 |
| 1.5 gal | 192 |
| 2 gal | 256 |
| 2.5 gal | 320 |
| 3 gal | 384 |
How the conversion works
The relationship is fl oz = gal × 128. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.
US gallon: US liquid gallon. The imperial gallon is about 20% larger.
Common questions
- What is 1 gal in US fluid ounces?
- 1 gal is 128 fl oz.
- How do you convert US gallons to US fluid ounces?
- Multiply by 128.
Related pages
- US gallons to US fluid ounces Full table and converter
- 1 fl oz to gal The other direction
- 0.5 gal to fl oz 64 fl oz
- 1.5 gal to fl oz 192 fl oz
- 2 gal to fl oz 256 fl oz
- 2.5 gal to fl oz 320 fl oz
- 3 gal to fl oz 384 fl oz
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place