Mendeleev
Science & measurement
Measurement system: US customary → US/Imperial length-derived

Convert US teaspoon (US tsp) → cubic inch (in³)

1 US tsp equals 0.30078125 in³. The name of a customary unit matters: US liquid and Imperial units are not interchangeable.

Why the distinction matters

US teaspoon and cubic inch belong to measurement conventions that may look familiar but are not always equivalent across countries. Mendeleev.com therefore keeps the system name next to the abbreviation and calculates from defined conversion factors rather than rounded kitchen rules.

Example

1 US tsp = 0.30078125 in³ · 10 US tsp = 3.0078125 in³.

0.30078125 in³

How to use this conversion

The conversion keeps the physical quantity unchanged; only the unit used to express it changes. Apply the relation below, keep the unit with the number, and round only at the end.

1 US tsp = 0.30078125 in³ · 10 US tsp = 3.0078125 in³.