This converter turns cubic inches into US quarts instantly, using the exact factor 1 cubic inch = 0.01731601732 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 volume of a one-inch cube, traditional for US engine displacement. 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
cubic inches- The amount you are converting, measured in cubic inches
0.01731601732- The exact number of US quarts in one cubic inch
US quarts- The converted result
How it works, step by step
- Enter the number of cubic inches you want to convert.
- The value is multiplied by 0.01731601732, 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 cubic inches
Multiply 5 by 0.017316017. That gives 0.08658 US quarts. A quick sanity check: one cubic inch is smaller than one US quart, so the number should get smaller — and it does.
Converting 72 cubic inches
72 × 0.017316017 = 1.2468 US quarts. Working backwards, 1.2468 ÷ 0.017316017 returns 72 cubic inches, 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 cubic inch?
Exactly 0.01731601732. 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 cubic inches to US quarts?
Us Quarts = cubic inches × 0.01731601732. To reverse it, divide instead: cubic inches = US quarts ÷ 0.01731601732, which is the same as multiplying by 57.75.
Is the cubic inch bigger than the US quart?
No. One cubic inch is only 0.017316 of a US quart, so the US quart is the larger unit.
Why does my answer differ slightly from other cubic-inches 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 cubic inch?
The volume of a one-inch cube, traditional for US engine displacement.
What is a US quart?
A quarter of a US gallon, just under one litre.
Cubic Inches to US quarts reference table
| Cubic Inches | Us Quarts |
|---|---|
| 0.5 in³ | 0.008658 qt |
| 1 in³ | 0.017316 qt |
| 2 in³ | 0.034632 qt |
| 3 in³ | 0.051948 qt |
| 5 in³ | 0.08658 qt |
| 10 in³ | 0.17316 qt |
| 15 in³ | 0.25974 qt |
| 20 in³ | 0.34632 qt |
| 25 in³ | 0.4329 qt |
| 50 in³ | 0.865801 qt |
| 75 in³ | 1.2987 qt |
| 100 in³ | 1.7316 qt |
| 250 in³ | 4.329 qt |
| 500 in³ | 8.658 qt |
| 1000 in³ | 17.316 qt |
Exact factor: 1 cubic inch = 0.01731601732 US quarts. Values rounded for display.