Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 tsp | 0.00492892 ml | |
| 0.01 tsp | 0.0492892 ml | |
| 0.1 tsp | 0.492892 ml | |
| 1 tsp | 4.92892 ml | |
| 5 tsp | 24.6446 ml | |
| 10 tsp | 49.2892 ml | |
| 50 tsp | 246.446 ml | |
| 100 tsp | 492.892 ml | |
| 1000 tsp | 4928.92 ml |
Common teaspoon values converted to milliliter — factor: 1 tsp = 4.929 mL
| Teaspoon (tsp) | Milliliter (mL) | Context |
|---|---|---|
| 0.25 tsp | 1.232 mL | Pinch |
| 0.5 tsp | 2.464 mL | Half teaspoon |
| 1 tsp | 4.929 mL | Teaspoon |
| 2 tsp | 9.858 mL | Two teaspoons |
| 3 tsp | 14.79 mL | Tablespoon |
| 6 tsp | 29.57 mL | 2 tablespoons |
| 12 tsp | 59.15 mL | Quarter cup |
| 24 tsp | 118.3 mL | Half cup |
| 48 tsp | 236.6 mL | One cup |
| 96 tsp | 473.2 mL | One pint |
| 192 tsp | 946.4 mL | One quart |
| 384 tsp | 1,893 mL | Half gallon |
| 768 tsp | 3,785 mL | One gallon |
| 1,536 tsp | 7,571 mL | 2 gallons |
| 3,840 tsp | 1.893e+04 mL | 5 gallons |
Converting teaspoon to milliliter comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using milliliter, or a laboratory protocol may specify volumes in teaspoon that need to be measured with equipment calibrated in milliliter.
In everyday use, knowing that 5 tsp = 24.64 mL and 10 tsp = 49.29 mL covers most common situations. For bulk calculations, 100 tsp = 492.9 mL is a useful anchor. The reverse conversion — milliliter back to teaspoon — uses the factor 0.2029, so 1 mL = 0.2029 tsp.
All conversions use the internationally recognized factor of exactly 1 tsp = 4.929 mL. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Milliliter = Teaspoon × 4.92892
Multiply any teaspoon value by 4.92892 to get milliliter. One teaspoon equals 4.92892 mL.
Reverse: Teaspoon = Milliliter × 0.2028842
Teaspoons × 4.929 = mL. Round to × 5 for quick estimates.
Use 5 mL per teaspoon — universal medicine dosing anchor.
Three teaspoons = one tablespoon = 15 mL.
Measures baking powder, baking soda, salt, and spices in teaspoons, the backbone of baking.
Administers children's liquid medicine in teaspoon doses as per OTC label instructions.
Tests flavor compound thresholds using teaspoon additions in sensory evaluation panels.
Adds clarifying agents and pH adjusters in teaspoon quantities to fermentation batches.
Formulates serums and toners using teaspoon measurements for small test batches.
Doses water conditioners and fertilizers in teaspoons for planted tanks and reef systems.
The US teaspoon is exactly one-third of a tablespoon, 4.92892 mL. It was standardized in the US in the early 20th century partly to address inconsistent home medication dosing.
Teaspoons are the smallest standard cooking measure in the US system, used for spices, leaveners, and flavorings. A medical teaspoon dose conventionally means 5 mL.
Interesting fact: The teaspoon is behind one of science's most cited comparisons: the entire Pacific Ocean would fill roughly 7.1 × 10²³ teaspoons.
The milliliter is one-thousandth of a liter, in use since the metric system was codified in France in 1795. The milli- prefix (from Latin mille, thousand) was standardized as part of the original SI prefix system.
Milliliters are the workhorse of medicine and cooking: syringes, dropper bottles, and nutritional labels all rely on mL for precise small-volume measurement. A standard US teaspoon is approximately 4.929 mL.
Interesting fact: The milliliter is numerically identical to the cubic centimeter (cm³), so 1 mL = 1 cm³ exactly. This equivalence is widely used in medicine, where a 5 cc syringe holds exactly 5 mL.