Imperial gallons to US fluid ounces
US fluid ounces = imperial gallons × 153.72159
Reverse: US fluid ounces to imperial gallons
How to convert imperial gallons to US fluid ounces
One imperial gallon is 153.72159 US fluid ounces, so multiply the number of imperial gallons by 153.72159. For example, 20 imperial gallons is 20 × 153.72159 = 3,074.43 US fluid ounces. To go back, divide by the same number, or multiply by 0.00650527.
Quick estimate
Multiplying by about 200 gets within 30.1% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Volume conversions come up in recipes, fuel economy, drink and bottle sizes, garden and pool water, and engine sizes.
| imperial gallons | US fluid ounces |
|---|---|
| 1 impgal | 153.72159 floz |
| 2 impgal | 307.443181 floz |
| 3 impgal | 461.164771 floz |
| 4 impgal | 614.886362 floz |
| 5 impgal | 768.607952 floz |
| 6 impgal | 922.329543 floz |
| 7 impgal | 1,076.05 floz |
| 8 impgal | 1,229.77 floz |
| 9 impgal | 1,383.49 floz |
| 10 impgal | 1,537.22 floz |
| 11 impgal | 1,690.94 floz |
| 12 impgal | 1,844.66 floz |
| 13 impgal | 1,998.38 floz |
| 14 impgal | 2,152.1 floz |
| 15 impgal | 2,305.82 floz |
| 16 impgal | 2,459.55 floz |
| 17 impgal | 2,613.27 floz |
| 18 impgal | 2,766.99 floz |
| 19 impgal | 2,920.71 floz |
| 20 impgal | 3,074.43 floz |
| 25 impgal | 3,843.04 floz |
| 30 impgal | 4,611.65 floz |
| 40 impgal | 6,148.86 floz |
| 50 impgal | 7,686.08 floz |
| 60 impgal | 9,223.3 floz |
| 70 impgal | 10,760.51 floz |
| 75 impgal | 11,529.12 floz |
| 80 impgal | 12,297.73 floz |
| 90 impgal | 13,834.94 floz |
| 100 impgal | 15,372.16 floz |
| 120 impgal | 18,446.59 floz |
| 150 impgal | 23,058.24 floz |
| 200 impgal | 30,744.32 floz |
| 250 impgal | 38,430.4 floz |
| 300 impgal | 46,116.48 floz |
| 400 impgal | 61,488.64 floz |
| 500 impgal | 76,860.8 floz |
| 750 impgal | 115,291.19 floz |
| 1,000 impgal | 153,721.59 floz |
| 1,500 impgal | 230,582.39 floz |
| 2,000 impgal | 307,443.18 floz |
| 5,000 impgal | 768,607.95 floz |
| 10,000 impgal | 1,537,215.9 floz |
Questions
How many US fluid ounces are in a imperial gallon?
153.72159 US fluid ounces.
How do I convert imperial gallons to US fluid ounces in a spreadsheet?
Put the value in A1 and type =A1*153.72159, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.