A cubic inch is the volume of a one-inch cube.
Cubic inches to Teaspoons Converter — in3 to tsp
Convert Cubic inch (in3) to Teaspoon (tsp) using the exact conversion factor (1 cubic inch = 3.324675325 teaspoon). See the formula, worked examples, conversion table, and common uses.
Cubic inches to Teaspoons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US teaspoon is one third of a US tablespoon.
Result = input x 1.6387064e-5 / 4.92892159e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic inches to Teaspoons
Cubic inch and Teaspoon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: A cubic inch is the volume of a one-inch cube, and a US teaspoon is one third of a US tablespoon.
Formula
teaspoons = cubic inches × 3.32467532468
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic inch equals 0.000016387064 base units, and 1 teaspoon equals 0.00000492892159375 base units, so dividing one by the other gives the direct cubic inch-to-teaspoon factor of 3.32467532468.
Simple example
1 in3 × 3.324675325 = 3.324675325 tsp
1 cubic inch = 3.324675325 teaspoons.
Real-world example
10 in3 × 3.324675325 = 33.24675325 tsp
10 cubic inches = 33.24675325 teaspoons.
Conversion table
| Cubic inch (in3) | Teaspoon (tsp) |
|---|---|
| 1 in3 | 3.324675325 tsp |
| 5 in3 | 16.62337662 tsp |
| 10 in3 | 33.24675325 tsp |
| 25 in3 | 83.11688312 tsp |
| 50 in3 | 166.2337662 tsp |
| 100 in3 | 332.4675325 tsp |
Reverse conversion: Teaspoon to Cubic inch
3.324675325 tsp × 0.30078125 = 1 in3
3.324675325 teaspoons = 1 cubic inches.
cubic inches = teaspoons × 0.30078125
For a page dedicated to this direction, see Teaspoon to Cubic inch.
Understanding the Cubic inch (in3)
A cubic inch is the volume of a one-inch cube.
Understanding the Teaspoon
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
Where it's used: United States (cooking and recipe measurement)
Uses of the Teaspoon today
- US recipe and cooking measurement for small quantities
- Medication dosing instructions in the US
- Baking measurement alongside the tablespoon and cup
Teaspoon — sources
- NIST Handbook 44, Appendix C — General tables of units including the US teaspoon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many teaspoons are in 1 cubic inch?
1 cubic inch equals 3.324675325 teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert cubic inch to teaspoon?
Multiply the cubic inch value by 3.324675325. The converter above does this instantly to whatever precision you set.
How do I convert teaspoon back to cubic inch?
Use the reverse factor: 1 teaspoon equals 0.30078125 cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic inch?
Cubic inch (in3) is a unit of volume.
What is a teaspoon?
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
Is the cubic inch to teaspoon conversion exact?
Yes. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.