Convert Teaspoon to Cubic Inch (tsp → in³)
The teaspoon is the smallest standard cooking spoon, equal to 5 milliliters and used worldwide in recipes.
Teaspoon to Cubic Inch Conversion Table
10 common values| Teaspoon | Cubic Inch |
|---|---|
| 1 tsp | 0.300781 in³ |
| 2 tsp | 0.601562 in³ |
| 5 tsp | 1.503906 in³ |
| 10 tsp | 3.007812 in³ |
| 20 tsp | 6.015623 in³ |
| 50 tsp | 15.039058 in³ |
| 100 tsp | 30.078115 in³ |
| 200 tsp | 60.156231 in³ |
| 500 tsp | 150.39058 in³ |
| 1,000 tsp | 300.78115 in³ |
How to Convert Teaspoon to Cubic Inch Manually
Step by StepConverting teaspoons to cubic inches is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in teaspoonsStart with the number of teaspoons (tsp) you want to convert.
- 2Multiply by 0.300781The conversion factor from tsp to in³ is 0.300781. Multiply your value by this number.
- 3Read the result in cubic inchesThe result is your value in cubic inches (in³).
Formula
Multiply the value in teaspoons by 0.300781. For the reverse direction, multiply by 3.324676.
in³ = tsp × 0.300781tsp = in³ × 3.324676Tips
Use these in everyday conversions- 1 tsp = 5 ml (practical); 4.929 ml (US legal).
- 3 tsp = 1 tbsp universally.
- Use a proper measuring spoon — household teaspoons vary 3–8 ml.
Common Mistakes
Avoid these- Using a regular cutlery teaspoon for medication — can over- or under-dose by 30–60%.
- Mixing tsp and tbsp — 3× difference.
- Assuming "a pinch" or "a dash" is reproducible — it varies 0.1 to 0.5 ml.
About Teaspoon and Cubic Inch
What is the Teaspoon?
The teaspoon equals exactly 5 milliliters (international culinary standard) or about 4.929 mL (US strict definition based on 1/3 of a tablespoon). The teaspoon is the smallest standard cooking measure, used worldwide for spices, baking soda, vanilla extract, salt, and small ingredient quantities. A flat (level) teaspoon is the recipe convention; rounded or heaping teaspoons are inconsistent and avoided in serious cooking. The teaspoon is also a medical unit: many liquid medications are dosed in teaspoons (5 mL standard). The teaspoon relates to the tablespoon (1 tbsp = 3 tsp), the cup (48 tsp = 1 cup), the milliliter (1 tsp = 5 mL conventional), and the fluid ounce (6 tsp = 1 fl oz). Standardized 5-mL measuring spoons are available globally to avoid the variability of household teaspoons (which range from 2 to 7 mL).
- Baking powder, salt and spices in recipes
- Over-the-counter liquid-medicine dosing
- Coffee and tea sweetener measurements
1 teaspoon of sugar = 4 g = 16 calories. Salt in a recipe often ½ to 1 tsp per 500 g food.
What is the Cubic Inch?
The cubic inch equals exactly 16.387064 cubic centimeters and is the traditional American unit for engine displacement and small-volume manufacturing measurements. Classic American muscle cars were famously identified by their cubic-inch engine size: the Ford 'Boss 429' had a 429-cubic-inch (7.0-liter) V8, and the Chevrolet 'Big Block 454' was 7.4 liters. Modern American automakers have transitioned mostly to liter-based naming (e.g., 'Hemi 5.7'), but the cubic inch persists in vintage car culture and aviation engines. It is also used for printer-paper coverage and industrial tolerances. The cubic inch relates to the cubic foot (1,728 in³ = 1 ft³), the cubic centimeter (1 in³ ≈ 16.39 cm³), the milliliter (1 in³ ≈ 16.39 mL), and the US fluid ounce (1 fl oz ≈ 1.805 in³).
- Classic US car engine displacement
- Firearms chamber and cartridge specs
- Some US machining and mould design
350 cu in V8 = 5.7 L engine. 302 cu in Ford V8 = 4.9 L. Modern specs typically give litres.