Teaspoons to Milliliters Converter - tsp to mL
Convert teaspoons to milliliters using the practical kitchen standard: 1 tsp = 5 mL. This is the value commonly shown on metric measuring spoons and is one of the clearest standards to use when writing or converting recipes.
Formula used here: mL = tsp x 5. Looking for the reverse conversion? Open the milliliters to teaspoons converter.
Kitchen standard
1 tsp = 5 mL
The simplest teaspoon-to-metric rule for recipes.
Half teaspoon
0.5 tsp = 2.5 mL
Common for extracts, spices, acids, and salt.
Tablespoon bridge
3 tsp = 15 mL
Useful because 1 tablespoon is often 15 mL.
Using Teaspoons and mL in Real Recipes
Teaspoons are easy to visualize while cooking, especially for small amounts of spices, extracts, baking powder, salt, or liquid flavorings. Milliliters, however, are easier to repeat, scale, and record accurately. That is why a teaspoon measurement is often converted when a home recipe is turned into a blog post, a kitchen prep sheet, a nutrition entry, or a larger batch recipe.
This converter uses the metric teaspoon standard of 5 mL. It keeps the calculation simple and matches many measuring spoon sets that show both tsp and mL markings. If you are working from an older US recipe, the exact US customary teaspoon is slightly smaller, but in everyday cooking the difference is usually less important than whether the spoon is level and the ingredient is measured consistently.
Quick Spoon Measures Cooks Actually Use
| Teaspoons | Milliliters | Where it often appears |
|---|---|---|
| 1/8 tsp | 0.625 mL | Strong spices or tiny adjustments |
| 1/4 tsp | 1.25 mL | Salt, baking soda, extracts |
| 1/2 tsp | 2.5 mL | Vanilla, lemon juice, spices |
| 1 tsp | 5 mL | A standard small spoon measure |
| 2 tsp | 10 mL | Sauces, oils, syrups |
| 3 tsp | 15 mL | Equivalent to 1 tablespoon |
If you work with baking ingredients, nutrition entries, or recipe scaling, you may also need grams to ounces , teaspoons to tablespoons , and milliliters to cups for converting ingredient amounts and preparing accurate batches.
Metric Teaspoon, US Teaspoon, and What to Write in a Recipe
For everyday cooking, the answer is usually simple: 1 teaspoon = 5 mL. That is the metric kitchen standard used by this converter, and it works well for everyday recipe writing and cooking.
The small difference between teaspoon standards only becomes important when you are preparing a professional recipe, converting an older cookbook, or matching a food label that refers to a specific regional measurement standard.
| Teaspoon standard | mL per tsp | Best use |
|---|---|---|
| Metric kitchen teaspoon | 5 mL | Modern recipes, meal prep, metric spoon sets |
| US customary teaspoon | about 4.9289 mL | Technical conversion from US customary volume |
| Household spoon | Varies | Not reliable for exact measuring |
A Simple Way to Scale a Small Recipe
Suppose a dressing recipe uses 2.5 teaspoons of vinegar. Convert it first: 2.5 x 5 = 12.5 mL. If you triple the recipe, the amount becomes 37.5 mL. That is much easier to pour and repeat accurately than trying to measure 7.5 teaspoons one spoonful at a time.
Practical caution
For medicine, do not rely on a regular household teaspoon. Always follow the labeled mL dose and use the dosing syringe, cup, or spoon supplied with the medicine.
For larger kitchen measurements, recipes often move between tablespoons to milliliters , cups to milliliters , and milliliters to teaspoons , especially when scaling recipes, adjusting batch sizes, or converting nutrition labels.
Precision matters more in medicine and baking than in casual cooking. For exact liquid measurements, related tools such as milliliters to liters and fluid ounces to milliliters are often used alongside teaspoon conversions.
Frequently asked questions
Why should liquid medicine be measured in mL instead of teaspoons?
Milliliters are safer and more consistent for medicine dosing because they use a fixed metric value. Household teaspoons can vary in size, which can lead to measurement errors. For liquid medicine, follow the labeled mL dose and use the dosing syringe, cup, or spoon supplied with the medicine.
Why do baking recipes often prefer grams or mL?
Baking relies on consistency, precision, and repeatable results, so recipes often use grams or milliliters instead of spoon-based measurements. Even small differences in ingredient amounts can affect texture, rise, moisture, and structure, especially in breads, cakes, cookies, and pastry recipes.
Why do US and metric teaspoons differ?
US teaspoon measurements developed separately from standardized metric kitchen measurements, which is why the values do not always match perfectly. In modern metric cooking, 1 teaspoon is defined as exactly 5 mL, while older regional systems, cookbook conventions, and household spoons may use slightly different amounts.
When are teaspoons more useful than milliliters?
Teaspoons are useful for quick household cooking, simple recipes, and informal kitchen measurements where a spoon measure is easy to picture and use. Milliliters are better when precision matters, such as in baking, nutrition labels, laboratory work, medicine dosing, and repeatable liquid measurements.