Convert 1 cup to impgal
1 US cup = 0.05204214 imperial gallons
Sumwise · Maintained by Theo Abbott (pen name) · automated checks · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How the checks work
How to convert US cups to imperial gallons
- Formula:
imperial gallons = US cups × 0.05204214 - Put in the value: 1 US cup.
- Result: 0.05204214 imperial gallons.
US cups to imperial gallons table
| US cups | imperial gallons |
|---|---|
| 1 cup | 0.05204214 impgal |
| 2 cup | 0.10408427 impgal |
| 5 cup | 0.26021068 impgal |
| 10 cup | 0.52042137 impgal |
| 20 cup | 1.040843 impgal |
| 50 cup | 2.602107 impgal |
| 100 cup | 5.204214 impgal |
| 500 cup | 26.021068 impgal |
| 1,000 cup | 52.042137 impgal |
Converting the other way: imperial gallons to US cups
US cups = imperial gallons × 19.215199. So 0.05204214 imperial gallons is back to 1 US cup; one imperial gallon is 19.215199 US cups. See the imperial gallons to US cups table.
Quick estimate in your head
For a rough answer, multiply by about 0.05: 1 × 0.05 ≈ 0.05 impgal, against the exact 0.05204214 impgal (3.9% 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 US cup is smaller than a imperial gallon, so the number of imperial gallons must come out smaller than the number of US cups. If your answer goes the other way, divide instead of multiplying.
About the units
US cup (cup) and imperial gallon (impgal) are both units of volume. One US cup equals 0.05204214 imperial gallons, and one imperial gallon equals 19.215199 US cups. 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.
1 US cup in other units
The most readable unit for this amount is US cups (1).
- 236.588236 ml
- 0.23658824 l
- 0.00023659 m3
- 48 tsp
- 16 tbsp
- 8 floz
- 0.5 pt
- 0.25 qt
- 0.0625 gal
- 0.05204214 impgal
How answers are calculated and checked: methodology.
Questions
How many imperial gallons are in 1 US cup?
0.05204214 imperial gallons.
What is the formula to convert US cups to imperial gallons?
imperial gallons = US cups × 0.05204214
How many imperial gallons are in one US cup?
One US cup is 0.05204214 imperial gallons, so multiply any number of US cups by 0.05204214.
Is 1 cup more than 1 impgal?
No. 1 US cup is 0.05204214 imperial gallons, which is less than 1 imperial gallon.
How do I convert US cups to imperial gallons in a spreadsheet?
Put the number of US cups in A1 and type =A1*0.05204214 in the next cell. Fill the formula down to convert a whole column.