This converter turns cubic inches into teaspoons instantly, using the exact factor 1 cubic inch = 3.324675325 teaspoons. 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. The smallest standard kitchen measure, 4.93 millilitres.
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
3.324675325- The exact number of teaspoons in one cubic inch
teaspoons- The converted result
How it works, step by step
- Enter the number of cubic inches you want to convert.
- The value is multiplied by 3.324675325, the exact conversion factor.
- The result is displayed in teaspoons, 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 3.3246753. That gives 16.6234 teaspoons. A quick sanity check: one cubic inch is larger than one teaspoon, so the number should get bigger — and it does.
Converting 72 cubic inches
72 × 3.3246753 = 239.3766 teaspoons. Working backwards, 239.3766 ÷ 3.3246753 returns 72 cubic inches, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many teaspoons are in one cubic inch?
Exactly 3.324675325. 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 teaspoons?
Teaspoons = cubic inches × 3.324675325. To reverse it, divide instead: cubic inches = teaspoons ÷ 3.324675325, which is the same as multiplying by 0.30078125.
Is the cubic inch bigger than the teaspoon?
Yes. One cubic inch equals 3.32468 teaspoons, so it is the larger unit.
Why does my answer differ slightly from other cubic-inches to teaspoons 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 teaspoon?
The smallest standard kitchen measure, 4.93 millilitres.
Cubic Inches to teaspoons reference table
| Cubic Inches | Teaspoons |
|---|---|
| 0.5 in³ | 1.6623 tsp |
| 1 in³ | 3.3247 tsp |
| 2 in³ | 6.6494 tsp |
| 3 in³ | 9.974 tsp |
| 5 in³ | 16.6234 tsp |
| 10 in³ | 33.2468 tsp |
| 15 in³ | 49.8701 tsp |
| 20 in³ | 66.4935 tsp |
| 25 in³ | 83.1169 tsp |
| 50 in³ | 166.2338 tsp |
| 75 in³ | 249.3506 tsp |
| 100 in³ | 332.4675 tsp |
| 250 in³ | 831.1688 tsp |
| 500 in³ | 1,662.34 tsp |
| 1000 in³ | 3,324.68 tsp |
Exact factor: 1 cubic inch = 3.324675325 teaspoons. Values rounded for display.