Convert Cup (US) to imperial gallons
Americas · Cooking Measures · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
1 Cup (US) = 0.0520421 imperial gallons
imperial gallons = Cup (US) × 0.052042085
Convert any amount
Cup (US) to imperial gallons table
| Cup (US) | imperial gallons |
|---|---|
| 0.25 Cup (US) | 0.0130105 imperial gallons |
| 0.5 Cup (US) | 0.026021 imperial gallons |
| 1 Cup (US) | 0.0520421 imperial gallons |
| 2 Cup (US) | 0.104084 imperial gallons |
| 3 Cup (US) | 0.156126 imperial gallons |
| 4 Cup (US) | 0.208168 imperial gallons |
| 5 Cup (US) | 0.26021 imperial gallons |
| 10 Cup (US) | 0.520421 imperial gallons |
| 20 Cup (US) | 1.04084 imperial gallons |
| 25 Cup (US) | 1.30105 imperial gallons |
| 50 Cup (US) | 2.6021 imperial gallons |
| 100 Cup (US) | 5.20421 imperial gallons |
About the Cup (US)
US cup = 236.6ml = 8 fl oz.
- Symbol
- cup US
- Value in SI
- 1 Cup (US) = 0.236588 litre
- Typical use
- cooking
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other cooking measures units in the Americas family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many imperial gallons are in a Cup (US)?
1 Cup (US) = 0.0520421 imperial gallons. Multiply the number of Cup (US) by 0.052042085 to get imperial gallons.
What is Cup (US) used for?
US cup = 236.6ml = 8 fl oz. It is classified as active and dates from the modern period.
Is the Cup (US) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Cup (US) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Cup (US) to imperial gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/cup-us-to-imperial-gallon
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