This converter turns US cups into US quarts instantly, using the exact factor 1 US cup = 0.25 US quarts. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition. A quarter of a US gallon, just under one litre.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US cups- The amount you are converting, measured in US cups
0.25- The exact number of US quarts in one US cup
US quarts- The converted result
How it works, step by step
- Enter the number of US cups you want to convert.
- The value is multiplied by 0.25, the exact conversion factor.
- The result is displayed in US quarts, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US cups
Multiply 5 by 0.25. That gives 1.25 US quarts. A quick sanity check: one US cup is smaller than one US quart, so the number should get smaller — and it does.
Converting 72 US cups
72 × 0.25 = 18 US quarts. Working backwards, 18 ÷ 0.25 returns 72 US cups, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US quarts are in one US cup?
Exactly 0.25. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US cups to US quarts?
Us Quarts = US cups × 0.25. To reverse it, divide instead: US cups = US quarts ÷ 0.25, which is the same as multiplying by 4.
Is the US cup bigger than the US quart?
No. One US cup is only 0.25 of a US quart, so the US quart is the larger unit.
Why does my answer differ slightly from other cups to quarts converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
What is a US quart?
A quarter of a US gallon, just under one litre.
Us Cups to US quarts reference table
| Us Cups | Us Quarts |
|---|---|
| 0.5 cup | 0.125 qt |
| 1 cup | 0.25 qt |
| 2 cup | 0.5 qt |
| 3 cup | 0.75 qt |
| 5 cup | 1.25 qt |
| 10 cup | 2.5 qt |
| 15 cup | 3.75 qt |
| 20 cup | 5 qt |
| 25 cup | 6.25 qt |
| 50 cup | 12.5 qt |
| 75 cup | 18.75 qt |
| 100 cup | 25 qt |
| 250 cup | 62.5 qt |
| 500 cup | 125 qt |
| 1000 cup | 250 qt |
Exact factor: 1 US cup = 0.25 US quarts. Values rounded for display.