UK cups to US cups
Type a value in UK cups and get the result in US cups, calculated exactly.
1 UK cups ≈ 1.200949926 US cups
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
cup (US) = cup (UK) × 1.2009499255
To convert UK cups to US cups, multiply the value by 1.2009499255.
Worked examples
- 1 cup (UK) × 1.2009499255 ≈ 1.200949926 cup (US)
- 100 cup (UK) × 1.2009499255 ≈ 120.0949926 cup (US)
- 50 cup (UK) × 1.2009499255 ≈ 60.04749628 cup (US)
This factor is exact by definition.
Conversion table
| UK cups (cup (UK)) | US cups (cup (US)) |
|---|---|
| 0.25 | ≈ 0.3002375 |
| 0.5 | ≈ 0.600475 |
| 0.75 | ≈ 0.9007124 |
| 1 | ≈ 1.20095 |
| 1.5 | ≈ 1.801425 |
| 2 | ≈ 2.4019 |
| 2.5 | ≈ 3.002375 |
| 3 | ≈ 3.60285 |
| 4 | ≈ 4.8038 |
| 5 | ≈ 6.00475 |
| 6 | ≈ 7.2057 |
| 8 | ≈ 9.607599 |
| 10 | ≈ 12.0095 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: US cups to UK cups
| US cups (cup (US)) | UK cups (cup (UK)) |
|---|---|
| 0.25 | ≈ 0.2081685 |
| 0.5 | ≈ 0.4163371 |
| 0.75 | ≈ 0.6245056 |
| 1 | ≈ 0.8326742 |
| 1.5 | ≈ 1.249011 |
| 2 | ≈ 1.665348 |
| 2.5 | ≈ 2.081685 |
| 3 | ≈ 2.498023 |
| 4 | ≈ 3.330697 |
| 5 | ≈ 4.163371 |
| 6 | ≈ 4.996045 |
| 8 | ≈ 6.661393 |
| 10 | ≈ 8.326742 |
Unit definitions
- UK cups cup (UK)
- The traditional imperial cup: half an imperial pint, exactly 284.130625 mL.
- US cups cup (US)
- The US customary cup: one sixteenth of a US gallon, exactly 236.5882365 mL.
Questions people ask
UK cups to US cups: what is the conversion factor?
One cup (UK) is ≈ 1.200949926 cup (US).
How do I convert UK cups to US cups?
Use the formula above. For example, 100 cup (UK) = ≈ 120.0949926 cup (US).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.