How to Convert US cups to US quarts (cup to qt)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert us cups into us quarts by hand, with examples and a quick-reference table.
The conversion
To convert us cups to us quarts, multiply the value by 0.2499997358. To go the other way, divide by the same number (or multiply by 4.0000042268). For a quick estimate, multiply by about 0.25.
US quarts = us cups × 0.2499997358
Worked examples
- 3 cup = 0.749999 qt
- 12.5 cup = 3.125 qt
- 75 cup = 18.75 qt
US cups to US quarts table
| US cups | US quarts |
|---|---|
| 1 cup | 0.25 qt |
| 2 cup | 0.499999 qt |
| 5 cup | 1.25 qt |
| 10 cup | 2.5 qt |
| 20 cup | 5 qt |
| 25 cup | 6.25 qt |
| 50 cup | 12.5 qt |
| 100 cup | 25 qt |
| 250 cup | 62.4999 qt |
| 500 cup | 124.9999 qt |
| 1,000 cup | 249.9997 qt |
Common questions
Is cup to qt exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US quarts to US cups converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For any value, use the US cups to US quarts Converter or browse all volume converters.
Run your own numbers: US cups to US quarts Converter