Cup (US) to Gallon (UK) Conversion Calculator: Free Online Tool
Convert US cups to UK gallons with our free online volume converter.
Cup (US) to Gallon (UK) Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Cup (US)).
- The converted value in Gallon (UK) will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Volume category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Cup (US) to Gallon (UK)
Converting Cup (US) to Gallon (UK) involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Cup (US) = 0.0520421 UK gallonsExample Calculation:
Convert 10 US cups: 10 × 0.0520421 = 0.520421 UK gallons
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Cup (US) and a Gallon (UK)?
The US customary cup is a unit of volume used in the United States for cooking and serving sizes. It is defined as exactly 8 US customary fluid ounces. This equates to approximately 236.59 milliliters (mL).
The UK gallon (Imperial gallon) is a unit of volume defined as 4.54609 litres.
Note: The Cup (US) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Gallon (UK) belongs to the imperial/US customary system.
History of the Cup (US) and Gallon (UK)
The concept of a 'cup' as a measurement unit evolved informally over centuries. The US customary cup was standardized based on the US gallon, which itself derived from the older English wine gallon. Unlike the metric cup (250 mL) or the imperial cup (approx. 284 mL), the US cup was legally defined in terms of the gallon (1 US gallon = 16 US cups).
The Imperial gallon was defined based on the volume of 10 pounds of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury and at a temperature of 62 °F.
Common Uses for US cups and UK gallons
Explore the typical applications for both Cup (US) (imperial/US) and Gallon (UK) (imperial/US) to understand their common contexts.
Common Uses for US cups
- Cooking & Baking: The primary use is measuring liquid and dry ingredients in recipes within the United States.
- Serving Sizes: Often used to indicate serving sizes on nutritional labels in the US.
- Informal Measurement: Used informally for estimating liquid quantities.
Common Uses for UK gallons
- Fuel Measurement: Used for measuring fuel (petrol, diesel) in the UK and some Commonwealth countries.
- Beverages: Selling milk and other beverages in large containers in the UK.
- Household Liquids: Measuring paint and other household liquids.
- Pools & Water: Pool capacity and water usage measurements in the UK.
- Industry: Some industrial applications in countries using the Imperial system.
Frequently Asked Questions
Questions About Cup (US) (cup)
How many fluid ounces are in a US cup?
There are exactly 8 US customary fluid ounces (fl oz) in 1 US cup.
How many milliliters are in a US cup?
One US cup is equivalent to approximately 236.59 milliliters (mL).
Is a US cup the same as a metric cup or an imperial cup?
No. A US cup (~236.59 mL) is smaller than both a metric cup (250 mL) used in many Commonwealth countries and an imperial cup (~284.13 mL) which is less commonly used today but part of the UK imperial system.
About Gallon (UK) (gal)
Is a UK gallon the same as a US gallon?
No, the UK (Imperial) gallon is defined as 4.54609 liters, while the US liquid gallon is defined as 3.785411784 liters. The UK gallon is approximately 20% larger than the US gallon.
How many pints are in a UK gallon?
There are exactly 8 Imperial pints in 1 UK (Imperial) gallon. This is the same number as in the US system, but since the Imperial pint is larger than the US pint, the total volume differs.
When did the UK adopt the Imperial gallon?
The Imperial gallon was established in 1824 as part of the British Weights and Measures Act, which standardized various units throughout the British Empire. Prior to this standardization, several different gallon measures were in use for different purposes.
Conversion Table: Cup (US) to Gallon (UK)
| Cup (US) (cup) | Gallon (UK) (gal) |
|---|---|
| 1 | 0.052 |
| 5 | 0.26 |
| 10 | 0.52 |
| 25 | 1.301 |
| 50 | 2.602 |
| 100 | 5.204 |
| 500 | 26.021 |
| 1,000 | 52.042 |