🧪 Volume Converter

Teaspoons to Cubic Inches
( tsp → in³ )

Instantly convert US teaspoons to cubic inches. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
tsp
in³
Result
1 tsp ≈ 0.3008 in³
0.3008
in³
The Formula
in³ = tsp × 0.30078125
1 US teaspoon = 231/768 cubic inches = exactly 0.30078125 in³. Derived from 1 US gal = 231 in³, 1 gal = 128 fl oz, 1 fl oz = 6 tsp.

How to Convert Teaspoons to Cubic Inches

To convert US teaspoons to cubic inches, multiply the number of teaspoons by 0.30078125. This exact factor comes from the relationship between gallons, fluid ounces, and teaspoons in US customary units.

Step-by-Step Example

Let’s convert 10 teaspoons to cubic inches:

1. Multiply by 0.30078125: 10 × 0.30078125 = 3.0078125
2. So 10 tsp equals 3.0078 in³.

For a smaller amount, 0.5 tsp × 0.30078125 = 0.150390625 in³.

When You’d Use Each Unit

Teaspoons are common in cooking for small volumes. Cubic inches are used in engineering, automotive (engine displacement), and for measuring small container volumes. Converting between them helps when dealing with recipes and technical specifications.

Conversion Table

Common teaspoons values converted to cubic inches — typical values highlighted.

Teaspoons (tsp) Cubic Inches (in³) Approximate
Frequently Asked Questions
How do I convert teaspoons to cubic inches quickly? +
Multiply by 0.3 for a rough estimate (e.g., 10 tsp ≈ 3 in³). For exact conversion, use 0.30078125. This tool provides the precise value.
How many cubic inches are in a teaspoon? +
There are exactly 0.30078125 cubic inches in one US teaspoon.
What is 1 tsp in in³? +
1 tsp = 0.30078125 in³.
What is 1 in³ in teaspoons? +
1 in³ ≈ 3.32468 tsp (since 1 / 0.30078125 ≈ 3.32468).
Is this the same for UK teaspoons? +
No, UK teaspoons are larger (≈5.91939 mL). This converter uses US teaspoons.
Can I convert cubic inches back to teaspoons with this tool? +
Yes! Just type a value into the cubic inches field and the teaspoons field updates automatically. Or use the ⇄ swap button to switch directions.
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