Convert US Teaspoon to Liter
Convert us teaspoons to liters instantly. 1 us teaspoon = 0.0049289216 liter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Liter to US Teaspoon converter for the reverse conversion.
Units explained
US Teaspoon
A US teaspoon is one third of a US tablespoon (4.9289 mL).
A standardized small cooking measure.
Used everywhere in US recipes and home dosing.
US cooking measure.
Liter
The liter is a metric unit of volume equal to one cubic decimeter (0.001 m³). It is the everyday metric volume unit.
Introduced in France in 1795; redefined in 1964 as exactly one cubic decimeter.
The world's common unit for beverages, fuel, and household liquids.
France, 1795; CGPM 1964.
US Teaspoon to Liter conversion formula
The relationship between us teaspoons and liters:
To convert us teaspoons to liters, multiply the value in us teaspoons by 0.0049289216. To reverse, multiply liters by 202.8841362111.
How to use this converter
Type a value into the calculator. The result in liters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Liter to US Teaspoon converter for the reverse direction.
Step-by-step: convert us teaspoons to liters
- Write down the value in us teaspoons (tsp).
- Multiply that value by the factor 0.0049289216.
- The product is the equivalent value in liters (L).
- To reverse, multiply the liter value by 202.8841362111.
Worked examples
Example 1 — Convert 1 tsp to L:
1 × 0.0049289216 = 0.0049289216 L
Example 2 — Convert 100 tsp to L:
100 × 0.0049289216 = 0.4928921594 L
Real-world example — Packaging gauge
A 4-us teaspoon plastic bag thickness is a common spec for grocery and freezer bags. Converting from us teaspoons to liters is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 tsp × 0.0049289216 = 0.0197156864 L
Real-world example — Plastic film and laminate thickness
A 500-us teaspoon sheet is a typical spec for ID-card laminates and film overlays. Converting to liters aligns the value with the unit most CAD systems and material datasheets prefer.
500 tsp × 0.0049289216 = 2.4644607969 L
US Teaspoon to Liter conversion table
Standard reference values for converting us teaspoons to liters:
| US Teaspoon [tsp] | Liter [L] |
|---|---|
| 0.01 | 4.928922e-5 |
| 0.1 | 0.0004928922 |
| 1 | 0.0049289216 |
| 2 | 0.0098578432 |
| 3 | 0.0147867648 |
| 4 | 0.0197156864 |
| 5 | 0.024644608 |
| 10 | 0.0492892159 |
| 20 | 0.0985784319 |
| 30 | 0.1478676478 |
| 40 | 0.1971568637 |
| 50 | 0.2464460797 |
| 100 | 0.4928921594 |
| 500 | 2.4644607969 |
| 1000 | 4.9289215938 |
Frequently asked questions
How many liters is 1 us teaspoon?
How do I convert us teaspoons to liters?
How do I convert liters back to us teaspoons?
How many liters is 100 us teaspoons?
Popular volume unit conversions
Convert US Teaspoon to other volume units
Show all US Teaspoon conversions
Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 tsp = 0.0049289216 L) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.