Teaspoons to Millilitres Converter
Type a value in teaspoons to see it in millilitres. It works both ways: type in the millilitres box to convert back.
Formula
To convert teaspoons to millilitres, multiply by 5.
1 tsp = 5 ml and 1 ml = 0.2 tsp.
Teaspoons to millilitres table
| Teaspoons | Millilitres |
|---|---|
| 0.25 tsp | 1.25 ml |
| 0.5 tsp | 2.5 ml |
| 1 tsp | 5 ml |
| 2 tsp | 10 ml |
| 3 tsp | 15 ml |
| 4 tsp | 20 ml |
| 5 tsp | 25 ml |
| 6 tsp | 30 ml |
Worked examples
0.5 tsp in millilitres
0.5 tsp
2.5 ml
0.5 × 5 = 2.5
3 tsp in millilitres
3 tsp
15 ml
3 × 5 = 15
5 tsp in millilitres
5 tsp
25 ml
5 × 5 = 25
About Teaspoons to Millilitres Converter
This converter turns teaspoons into millilitres as you type, and works the other way too: type in the millilitres box to convert back. To convert teaspoons to millilitres, multiply by 5. For example, 0.5 tsp is 2.5 ml, and 3 tsp is 15 ml.
Volume conversions are easy to get wrong because UK and US gallons, pints and fluid ounces are different sizes. Each page here says which system it uses. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Teaspoons to Millilitres Converter
- Type the amount in teaspoons in the first box.
- Read the answer in millilitres in the second box and in the result line below.
- To convert the other way, type in the millilitres box instead, or use the swap button to open the millilitres to teaspoons page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Converting fuel, paint or liquid quantities
- Following a recipe from another country
- Working out a drink size or a bottle size
- Comparing fuel economy or tank sizes
Frequently asked questions
How many millilitres are in one teaspoon?
There are 5 millilitres in one teaspoon. This figure is exact, because both units have fixed definitions.
How do I convert teaspoons to millilitres?
To convert teaspoons to millilitres, multiply by 5. For example, 5 tsp is 25 ml.
How do I convert millilitres to teaspoons?
Going the other way, divide by 5 (the same as multiplying by 0.2). The millilitres to teaspoons converter does this for you.
What is 3 tsp in millilitres?
3 tsp is 15 ml.
Why are UK and US gallons different?
The UK redefined its gallon in 1824 as the volume of 10 pounds of water, about 4.546 litres. The US kept an older wine gallon of 231 cubic inches, about 3.785 litres. Pints and fluid ounces differ for the same reason.