Millilitres to Teaspoons Converter
Convert millilitres to teaspoons — one metric teaspoon is 5 ml exactly. Results update as you type; exact factors shown.
One millilitre is 0.2 teaspoon (metric) — see the exact factor, not a rounded rule of thumb.
How the millilitres to teaspoons converter works
Volumes convert through the litre (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common volume conversions
| From | To | Units |
|---|---|---|
| 1 mL | 0.2 tsp | millilitre to teaspoon (metric) |
| 2.5 mL | 0.5 tsp | millilitres to teaspoon (metric) |
| 5 mL | 1 tsp | millilitres to teaspoon (metric) |
| 7.5 mL | 1.5 tsp | millilitres to teaspoon (metric) |
| 10 mL | 2 tsp | millilitres to teaspoon (metric) |
| 15 mL | 3 tsp | millilitres to teaspoon (metric) |
| 20 mL | 4 tsp | millilitres to teaspoon (metric) |
| 25 mL | 5 tsp | millilitres to teaspoon (metric) |
| 30 mL | 6 tsp | millilitres to teaspoon (metric) |
| 50 mL | 10 tsp | millilitres to teaspoon (metric) |
| 100 mL | 20 tsp | millilitres to teaspoon (metric) |
| 250 mL | 50 tsp | millilitres to teaspoon (metric) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in litres |
|---|---|---|
| millilitre | mL | 0.001 litre |
| litre | L | 1 litre |
| cubic metre | m³ | 1,000 litre |
| teaspoon (metric) | tsp | 0.005 litre |
| tablespoon (metric) | tbsp | 0.015 litre |
| cup (metric) | cup | 0.25 litre |
| US fluid ounce | US fl oz | 0.0295735296 litre |
| US cup | US cup | 0.2365882365 litre |
| US pint | US pt | 0.473176473 litre |
| US gallon | US gal | 3.785411784 litre |
| imperial fluid ounce | imp fl oz | 0.0284130625 litre |
| imperial pint | imp pt | 0.56826125 litre |
| imperial gallon | imp gal | 4.54609 litre |
| cubic foot | ft³ | 28.316846592 litre |
FAQFrequently asked questions about volume conversion
How many ml in a teaspoon?
5 ml for the metric teaspoon used in Australia, the UK and most recipes. A US teaspoon is 4.929 ml, close enough that it rarely matters.
How many teaspoons is 10 ml?
Two.
How many teaspoons in a tablespoon?
Three in the UK and US; four in Australia, where the tablespoon is 20 ml.
Is a medicine spoon a teaspoon?
A dosing spoon is 5 ml, the same as a metric teaspoon — but use the supplied spoon or a syringe, not cutlery, which varies widely.
How many ml is a quarter teaspoon?
1.25 ml.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.