Convert Cubic Inch to Teaspoon (in³ → tsp)
The cubic inch measures classic American engine displacement and small-volume manufacturing tolerances.
Cubic Inch to Teaspoon Conversion Table
10 common values| Cubic Inch | Teaspoon |
|---|---|
| 1 in³ | 3.324676 tsp |
| 2 in³ | 6.649353 tsp |
| 5 in³ | 16.623382 tsp |
| 10 in³ | 33.246764 tsp |
| 20 in³ | 66.493528 tsp |
| 50 in³ | 166.23382 tsp |
| 100 in³ | 332.46764 tsp |
| 200 in³ | 664.93528 tsp |
| 500 in³ | 1,662.3382 tsp |
| 1,000 in³ | 3,324.6764 tsp |
How to Convert Cubic Inch to Teaspoon Manually
Step by StepConverting cubic inches to teaspoons is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in cubic inchesStart with the number of cubic inches (in³) you want to convert.
- 2Multiply by 3.324676The conversion factor from in³ to tsp is 3.324676. Multiply your value by this number.
- 3Read the result in teaspoonsThe result is your value in teaspoons (tsp).
Formula
Multiply the value in cubic inches by 3.324676. For the reverse direction, multiply by 0.300781.
tsp = in³ × 3.324676in³ = tsp × 0.300781Tips
Use these in everyday conversions- 1 in³ = 16.387 cm³ exactly.
- To convert cubic inches to litres, divide by 61.02.
- US automotive ads today quote both cu in and L for classic cars.
Common Mistakes
Avoid these- Confusing in³ with in² or linear inches.
- Using 16 instead of 16.387 on precision machining.
- Assuming modern European engines are marked in cu in — they are always in L or cc.
About Cubic Inch and Teaspoon
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.
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.