Convert US Cup to US Quart
Convert us cups to us quarts instantly. 1 us cup = 0.25 us quart — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Quart to US Cup converter for the reverse conversion.
Units explained
US Cup
A US customary cup is one sixteenth of a US gallon (236.588 mL).
Standardized for American cooking; distinct from the 240 mL US legal cup and the 250 mL metric cup.
The standard US cooking-volume unit in recipes.
US customary cooking measure.
US Quart
A US liquid quart is one quarter of a US gallon (0.946352946 L).
From the Latin quartus, a quarter of a gallon.
Used for milk, oil and household liquids in the US.
English customary.
US Cup to US Quart conversion formula
The relationship between us cups and us quarts:
To convert us cups to us quarts, multiply the value in us cups by 0.25. To reverse, multiply us quarts by 4.
How to use this converter
Type a value into the calculator. The result in us quarts updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Quart to US Cup converter for the reverse direction.
Step-by-step: convert us cups to us quarts
- Write down the value in us cups (cup).
- Multiply that value by the factor 0.25.
- The product is the equivalent value in us quarts (qt).
- To reverse, multiply the us quart value by 4.
Worked examples
Example 1 — Convert 1 cup to qt:
1 × 0.25 = 0.25 qt
Example 2 — Convert 100 cup to qt:
100 × 0.25 = 25 qt
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 us cups), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 cup × 0.25 = 0.75 qt
Real-world example — Plastic-film thickness alternates
A 150-us cup plastic film converts cleanly to us quarts — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 cup × 0.25 = 37.5 qt
Real-world example — Hair-width scale measurements
A 70-us cup measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like us quarts for direct comparison across supplier datasheets.
70 cup × 0.25 = 17.5 qt
US Cup to US Quart conversion table
Standard reference values for converting us cups to us quarts:
| US Cup [cup] | US Quart [qt] |
|---|---|
| 0.01 | 0.0025 |
| 0.1 | 0.025 |
| 1 | 0.25 |
| 2 | 0.5 |
| 3 | 0.75 |
| 4 | 1 |
| 5 | 1.25 |
| 10 | 2.5 |
| 20 | 5 |
| 30 | 7.5 |
| 40 | 10 |
| 50 | 12.5 |
| 100 | 25 |
| 500 | 125 |
| 1000 | 250 |
Frequently asked questions
How many us quarts is 1 us cup?
How do I convert us cups to us quarts?
How do I convert us quarts back to us cups?
How many us quarts is 100 us cups?
Popular volume unit conversions
Convert US Cup to other volume units
Show all US Cup conversions
Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 cup = 0.25 qt) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.