Imperial gallons to US cups
US cups = imperial gallons × 19.215199
Reverse: US cups to imperial gallons
How to convert imperial gallons to US cups
One imperial gallon is 19.215199 US cups, so multiply the number of imperial gallons by 19.215199. For example, 20 imperial gallons is 20 × 19.215199 = 384.303976 US cups. To go back, divide by the same number, or multiply by 0.05204214.
Quick estimate
Multiplying by about 20 gets within 4.1% 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 cups |
|---|---|
| 1 impgal | 19.215199 cup |
| 2 impgal | 38.430398 cup |
| 3 impgal | 57.645596 cup |
| 4 impgal | 76.860795 cup |
| 5 impgal | 96.075994 cup |
| 6 impgal | 115.291193 cup |
| 7 impgal | 134.506392 cup |
| 8 impgal | 153.72159 cup |
| 9 impgal | 172.936789 cup |
| 10 impgal | 192.151988 cup |
| 11 impgal | 211.367187 cup |
| 12 impgal | 230.582386 cup |
| 13 impgal | 249.797585 cup |
| 14 impgal | 269.012783 cup |
| 15 impgal | 288.227982 cup |
| 16 impgal | 307.443181 cup |
| 17 impgal | 326.65838 cup |
| 18 impgal | 345.873579 cup |
| 19 impgal | 365.088777 cup |
| 20 impgal | 384.303976 cup |
| 25 impgal | 480.37997 cup |
| 30 impgal | 576.455964 cup |
| 40 impgal | 768.607952 cup |
| 50 impgal | 960.75994 cup |
| 60 impgal | 1,152.91 cup |
| 70 impgal | 1,345.06 cup |
| 75 impgal | 1,441.14 cup |
| 80 impgal | 1,537.22 cup |
| 90 impgal | 1,729.37 cup |
| 100 impgal | 1,921.52 cup |
| 120 impgal | 2,305.82 cup |
| 150 impgal | 2,882.28 cup |
| 200 impgal | 3,843.04 cup |
| 250 impgal | 4,803.8 cup |
| 300 impgal | 5,764.56 cup |
| 400 impgal | 7,686.08 cup |
| 500 impgal | 9,607.6 cup |
| 750 impgal | 14,411.4 cup |
| 1,000 impgal | 19,215.2 cup |
| 1,500 impgal | 28,822.8 cup |
| 2,000 impgal | 38,430.4 cup |
| 5,000 impgal | 96,075.99 cup |
| 10,000 impgal | 192,151.99 cup |
Questions
How many US cups are in a imperial gallon?
19.215199 US cups.
How do I convert imperial gallons to US cups in a spreadsheet?
Put the value in A1 and type =A1*19.215199, 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.