A US teaspoon is one third of a US tablespoon.
Teaspoons to Deciliters Converter — tsp to dL
Convert Teaspoon (tsp) to Deciliter (dL) using the exact conversion factor (1 teaspoon = 0.0492892159 deciliter). See the formula, worked examples, conversion table, and common uses.
Teaspoons to Deciliters 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.
Deciliter is 0.1 liter units.
Result = input x 4.92892159e-6 / 0.0001.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Teaspoons to Deciliters
Teaspoon and Deciliter 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. Teaspoon is most often used for us recipe and cooking measurement for small quantities.
Formula
deciliters = teaspoons × 0.0492892159375
This factor comes from each unit's defined relationship to the category's base unit: 1 teaspoon equals 0.00000492892159375 base units, and 1 deciliter equals 0.0001 base units, so dividing one by the other gives the direct teaspoon-to-deciliter factor of 0.0492892159375.
Simple example
1 tsp × 0.04928921594 = 0.0492892159 dL
1 teaspoon = 0.0492892159 deciliters.
Real-world example
10 tsp × 0.04928921594 = 0.4928921594 dL
10 teaspoons = 0.4928921594 deciliters.
Conversion table
| Teaspoon (tsp) | Deciliter (dL) |
|---|---|
| 1 tsp | 0.0492892159 dL |
| 5 tsp | 0.2464460797 dL |
| 10 tsp | 0.4928921594 dL |
| 25 tsp | 1.232230398 dL |
| 50 tsp | 2.464460797 dL |
| 100 tsp | 4.928921594 dL |
Reverse conversion: Deciliter to Teaspoon
0.0492892159 dL × 20.28841362 = 0.9999999992 tsp
0.0492892159 deciliters = 0.9999999992 teaspoons.
teaspoons = deciliters × 20.2884136211
For a page dedicated to this direction, see Deciliter to Teaspoon.
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
Understanding the Deciliter (dL)
Deciliter is 0.1 liter units.
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 deciliters are in 1 teaspoon?
1 teaspoon equals 0.0492892159 deciliters, using the exact defined conversion factor rather than an estimate.
How do I convert teaspoon to deciliter?
Multiply the teaspoon value by 0.04928921594. The converter above does this instantly to whatever precision you set.
How do I convert deciliter back to teaspoon?
Use the reverse factor: 1 deciliter equals 20.28841362 teaspoons. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a deciliter?
Deciliter (dL) is a unit of volume.
Is the teaspoon to deciliter 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.
Where is the teaspoon still used today?
United States (cooking and recipe measurement)