Convert 18 impgal to cup
18 imperial gallons = 345.873579 US cups
How to convert imperial gallons to US cups
- Formula:
US cups = imperial gallons × 19.215199 - Put in the value: 18 imperial gallons.
- Result: 345.873579 US cups.
Imperial gallons to US cups table
| imperial gallons | US cups |
|---|---|
| 1 impgal | 19.215199 cup |
| 2 impgal | 38.430398 cup |
| 5 impgal | 96.075994 cup |
| 10 impgal | 192.151988 cup |
| 18 impgal | 345.873579 cup |
| 20 impgal | 384.303976 cup |
| 50 impgal | 960.75994 cup |
| 100 impgal | 1,921.52 cup |
| 500 impgal | 9,607.6 cup |
| 1,000 impgal | 19,215.2 cup |
Converting the other way: US cups to imperial gallons
imperial gallons = US cups × 0.05204214. So 345.873579 US cups is back to 18 imperial gallons; one US cup is 0.05204214 imperial gallons. See the US cups to imperial gallons table.
Quick estimate in your head
For a rough answer, multiply by about 20: 18 × 20 ≈ 360 cup, against the exact 345.873579 cup (4.1% out). Good enough to check that a calculated result is sensible.
Common mistakes
The usual slip is using the factor the wrong way round. A imperial gallon is bigger than a US cup, so the number of US cups must come out larger than the number of imperial gallons. If your answer goes the other way, divide instead of multiplying.
About the units
Imperial gallon (impgal) and US cup (cup) are both units of volume. One imperial gallon equals 19.215199 US cups, and one US cup equals 0.05204214 imperial gallons. Results on this page are rounded for display; the conversion itself uses the exact definitions.
Volume conversions come up in recipes, fuel economy, drink and bottle sizes, garden and pool water, and engine sizes.
18 imperial gallons in other units
The most readable unit for this amount is imperial gallons (18).
How this answer was calculated
The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.
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Questions
How many US cups are in 18 imperial gallons?
345.873579 US cups.
What is the formula to convert imperial gallons to US cups?
US cups = imperial gallons × 19.215199
How many US cups are in one imperial gallon?
One imperial gallon is 19.215199 US cups, so multiply any number of imperial gallons by 19.215199.
Is 18 impgal more than 18 cup?
Yes. 18 imperial gallons is 345.873579 US cups, which is more than 18 US cups.
How do I convert imperial gallons to US cups in a spreadsheet?
Put the number of imperial gallons in A1 and type =A1*19.215199 in the next cell. Fill the formula down to convert a whole column.