1 gal = 128.00006762811 fl oz
1 US gallon (gal) = 128.00006762811 US fluid ounce (fl oz).
If you want to reverse convert, use US fluid ounce → US gallon. 1 fl oz = 0.0078124958723097 gal. You can also explore the full Volume converter page for more cross conversions.
Conversion formula
US gallon to US fluid ounce formula: value in fl oz = value in gal × 128.00006762811.
US fluid ounce to US gallon formula: value in gal = value in fl oz × 0.0078124958723097.
How to convert US gallon to US fluid ounce
To convert US gallon to US fluid ounce, multiply the value in gal by 128.00006762811. This gives the result in fl oz.
For example, 1 gal = 128.00006762811 fl oz and 10 gal = 1280.0006762811 fl oz.
What is US gallon?
US gallon (gal): The US liquid gallon, used for fuel and large containers. Smaller than the imperial gallon. 1 gal ≈ 3.78541 L.
What is US fluid ounce?
US fluid ounce (fl oz): The US fluid ounce measures volume. It is not the mass ounce or the imperial fluid ounce. 1 fl oz ≈ 29.5735 mL.
FAQ
How many us fluid ounce are in 1 us gallon?
There are 128.00006762811 fl oz in 1 gal.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert us gallon to us fluid ounce?
Multiply the value in gal by 128.00006762811 to get the value in fl oz.
US gallon → other Volume units
- 1 us gallon → cubic meter = 0.00378541 cubic meter
- 1 us gallon → cubic centimeter = 3785.41 cubic centimeter
- 1 us gallon = 3785410 cubic millimeter
- 1 us gallon → hectoliter = 0.0378541 hectoliter
- 1 us gallon → liter = 3.78541 liter
- 1 us gallon → deciliter = 37.8541 deciliter
- 1 us gallon → centiliter = 378.541 centiliter
- 1 us gallon → milliliter = 3785.41 milliliter
- 1 us gallon → cubic feet = 0.13368049251642 cubic feet
- 1 us gallon → cubic inch = 230.99989113364 cubic inch
- 1 us gallon → cubic yard = 0.0049511293537553 cubic yard
- 1 us gallon → us liquid pint = 8.0000042267571 us liquid pint
- 1 us gallon → us teaspoon = 768.00300269837 us teaspoon
- 1 us gallon → us tablespoon = 255.99580712788 us tablespoon
- 1 us gallon → us customary cup = 16.000008453514 us customary cup
- 1 us gallon → us liquid quart = 3.9999978866237 us liquid quart
- 1 us gallon → us fluid ounce = 128.00006762811 us fluid ounce
- 1 us gallon → imperial gallon = 0.83267379220385 imperial gallon
US gallon → US fluid ounce Table
The table below shows common values from US gallon to US fluid ounce and the reverse direction for quick reference.
| gal | fl oz | Rounded |
|---|---|---|
| 1 gal | 128.00006762811 fl oz | 128.0001 |
| 2 gal | 256.00013525623 fl oz | 256.0001 |
| 3 gal | 384.00020288434 fl oz | 384.0002 |
| 4 gal | 512.00027051245 fl oz | 512.0003 |
| 5 gal | 640.00033814057 fl oz | 640.0003 |
| 10 gal | 1280.0006762811 fl oz | 1280.0007 |
| 12 gal | 1536.0008115374 fl oz | 1536.0008 |
| 15 gal | 1920.0010144217 fl oz | 1920.0010 |
| 20 gal | 2560.0013525623 fl oz | 2560.0014 |
| 25 gal | 3200.0016907028 fl oz | 3200.0017 |
| 30 gal | 3840.0020288434 fl oz | 3840.0020 |
| 40 gal | 5120.0027051245 fl oz | 5120.0027 |
| 50 gal | 6400.0033814057 fl oz | 6400.0034 |
| 75 gal | 9600.0050721085 fl oz | 9600.0051 |
| 100 gal | 12800.006762811 fl oz | 12800.0068 |
| 200 gal | 25600.013525623 fl oz | 25600.0135 |
| 250 gal | 32000.016907028 fl oz | 32000.0169 |
| 500 gal | 64000.033814056 fl oz | 64000.0338 |
| 750 gal | 96000.050721085 fl oz | 96000.0507 |
| 1000 gal | 128000.06762811 fl oz | 128000.0676 |
| 2500 gal | 320000.16907028 fl oz | 320000.1691 |
| 5000 gal | 640000.33814057 fl oz | 640000.3381 |
| 10000 gal | 1280000.6762811 fl oz | 1280000.6763 |
US fluid ounce → US gallon Table
| fl oz | gal | Rounded |
|---|---|---|
| 1 fl oz | 0.0078124958723097 gal | 0.0078 |
| 2 fl oz | 0.015624991744619 gal | 0.0156 |
| 3 fl oz | 0.023437487616929 gal | 0.0234 |
| 4 fl oz | 0.031249983489239 gal | 0.0312 |
| 5 fl oz | 0.039062479361549 gal | 0.0391 |
| 10 fl oz | 0.078124958723097 gal | 0.0781 |
| 12 fl oz | 0.093749950467717 gal | 0.0937 |
| 15 fl oz | 0.11718743808465 gal | 0.1172 |
| 20 fl oz | 0.15624991744619 gal | 0.1562 |
| 25 fl oz | 0.19531239680774 gal | 0.1953 |
| 30 fl oz | 0.23437487616929 gal | 0.2344 |
| 40 fl oz | 0.31249983489239 gal | 0.3125 |
| 50 fl oz | 0.39062479361549 gal | 0.3906 |
| 75 fl oz | 0.58593719042323 gal | 0.5859 |
| 100 fl oz | 0.78124958723097 gal | 0.7812 |
| 200 fl oz | 1.5624991744619 gal | 1.5625 |
| 250 fl oz | 1.9531239680774 gal | 1.9531 |
| 500 fl oz | 3.9062479361549 gal | 3.9062 |
| 750 fl oz | 5.8593719042323 gal | 5.8594 |
| 1000 fl oz | 7.8124958723097 gal | 7.8125 |
| 2500 fl oz | 19.531239680774 gal | 19.5312 |
| 5000 fl oz | 39.062479361549 gal | 39.0625 |
| 10000 fl oz | 78.124958723097 gal | 78.1250 |
US fluid ounce → US gallon
The reverse value is 1 fl oz = 0.0078124958723097 gal.