Teaspoons to Millilitres Converter
Convert teaspoons to ml instantly. 1 US teaspoon = 4.929 ml. Quick reference for ½ tsp, 1 tsp, 2 tsp and more.
Result
4.93 ml
Understanding Teaspoons to Millilitres
One US teaspoon equals exactly 4.929 millilitres (often rounded to 5ml). This is a fixed conversion because both measure volume. However, UK teaspoons are 5.919ml (about 20% larger), and metric teaspoons are exactly 5ml. Australian teaspoons are also 5ml. The difference between US and UK teaspoons can significantly affect recipes with multiple teaspoon measurements.
When to Use Teaspoons to Millilitres
Working with recipes from different countries? Converting teaspoons to millilitres is useful when you need precise liquid measurements. Teaspoons are commonly used in American and British recipes, while millilitres are standard in metric countries. This conversion is essential for medicine dosing, cocktails, and precise flavouring.
Practical Tips
This conversion is most useful for liquids like vanilla extract, lemon juice, or oil, where the measurement is straightforward. It's also helpful when you have measuring spoons marked in teaspoons but need millilitre equivalents, or when following international recipes. For most purposes, treating 1 teaspoon as 5ml is accurate enough.
Quick Tips
- 1 US teaspoon = 4.929ml (approximately 5ml)
- UK teaspoons are slightly larger at 5.919ml
- Metric teaspoons are exactly 5ml
- This conversion works perfectly for all liquids since both measure volume
Common Mistakes to Avoid
The most common error is assuming all teaspoons are the same size. US teaspoons (4.929ml) and UK teaspoons (5.919ml) differ by about 20%. Using UK teaspoons when a US recipe calls for teaspoons would give you 20% more of each ingredient. Another mistake is using household spoons instead of measuring spoons — regular teaspoons vary widely in size.
When Precision Matters
Precision matters for medicine dosing (always use the provided measuring device), cocktails where flavour balance is critical, and when measuring expensive ingredients like vanilla extract or saffron. For cooking, the difference between 4.929ml and 5ml rarely matters. For baking with leavening agents, consider converting to grams instead.
Quick Reference
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Teaspoons to Millilitres Reference Table
| teaspoons | millilitres |
|---|---|
| 0.25 tsp | 1.23 ml |
| 0.5 tsp | 2.46 ml |
| 1 tsp | 4.93 ml |
| 1.5 tsp | 7.39 ml |
| 2 tsp | 9.86 ml |
| 3 tsp | 14.8 ml |
| 4 tsp | 19.7 ml |
| 5 tsp | 24.6 ml |
| 10 tsp | 49.3 ml |
| 25 tsp | 123 ml |
| 50 tsp | 246 ml |
| 100 tsp | 493 ml |