Teaspoons to ML Converter
Enter a value in teaspoons, choose the teaspoon standard, and convert instantly to millilitres (ml).
Type the number of teaspoons, pick the teaspoon type, then press Convert.
Common teaspoon to millilitre conversions
These quick reference values are handy when you only need an approximate teaspoons-to-millilitres conversion. The table assumes level teaspoons measured with standard kitchen spoons.
| Teaspoon type | 1 tsp ⇢ ml | 2 tsp ⇢ ml | 3 tsp ⇢ ml |
|---|---|---|---|
| US teaspoon | ≈ 4.93 ml | ≈ 9.86 ml | ≈ 14.79 ml |
| Metric teaspoon | 5.00 ml | 10.00 ml | 15.00 ml |
| UK teaspoon (imperial) | ≈ 5.92 ml | ≈ 11.84 ml | ≈ 17.76 ml |
How are teaspoons converted to millilitres
Converting teaspoons to millilitres is a straight volume-to-volume conversion. Both units measure volume, but the exact size of a teaspoon depends on the standard you are using. This tool relies on typical definitions for each teaspoon type:
- US teaspoon: about 4.93 ml (formally 4.9289 ml)
- Metric teaspoon: exactly 5 ml
- UK teaspoon (imperial): about 5.92 ml
- US tablespoon: 3 US tsp, roughly 14.79 ml
- Metric tablespoon: 3 metric tsp, exactly 15 ml
- US fluid ounce: 6 US tsp, about 29.57 ml
- US cup: 48 US tsp, about 236.59 ml
For the teaspoon type you select, the calculator multiplies the number of teaspoons by that standard’s millilitres-per-teaspoon value. It also shows a rough equivalent in tablespoons so you can match whatever unit your recipe or drink measure uses.
Why online teaspoons to ml converters sometimes differ
Many generic converters quietly assume a 5 ml teaspoon, while others use the US definition of about 4.93 ml or the larger UK teaspoon. If you mix these standards, the numbers can disagree by more than 10 %. By letting you pick the teaspoon type explicitly, this converter keeps the result consistent with the system you are actually using.
When to use teaspoons vs millilitres
Teaspoons are convenient for quick everyday cooking or when you only need tiny amounts of a liquid ingredient. Millilitres are more helpful when:
- You are following recipes that list liquids in ml, especially from outside your country.
- You want repeatable results across different sets of measuring spoons.
- You are scaling drinks, sauces, or medicines and need exact liquid volumes.
A practical workflow is to measure casually in teaspoons when precision is not critical, then use this calculator to translate those amounts into millilitres whenever you need a clear, standardized volume.
Teaspoons to ml converter: quick FAQ
Why do I need to choose a teaspoon type?
A US teaspoon is slightly smaller than a metric teaspoon, and a UK teaspoon is a bit larger than both. If the calculator assumed a single “universal” teaspoon size, your conversion could be off by more than a teaspoon over larger quantities. Selecting the teaspoon type keeps the math tied to the standard you are actually using.
How accurate is this teaspoons to millilitres conversion?
The underlying teaspoon and tablespoon sizes are based on standard volume definitions, so the conversion is mathematically precise. Small differences can still come from how full you make the spoon or how level it is, so measuring directly in ml with a jug or syringe is always the most exact approach.
What if my recipe just says “tsp” without a country?
Most modern cookbooks and online recipes either use metric teaspoons (5 ml) or US teaspoons (≈ 4.93 ml). If you are unsure, choosing the metric teaspoon will usually give a close result. For very sensitive recipes or medicines, check the source or use equipment that measures directly in millilitres.
