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Teaspoons to ml Converter

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Convert teaspoons to milliliters using the US-standard factor 1 tsp ≈ 4.9289 ml. 1 tsp ≈ 5 ml; 3 tsp = 1 tbsp ≈ 15 ml; 6 tsp ≈ 30 ml = 1 fl oz. Practical when a US recipe gives small amounts in tsp but you need millilitre precision — the difference between 4.93 ml and 5 ml only matters for clinical dosing, not cooking. Browser-local.

Decimal places:

From (Cooking, Teaspoon)

Teaspoon (tsp)

To (Metric, Milliliter)

Milliliter (ml)

Teaspoon (tsp) → Milliliter (ml)

Quick reference table

Teaspoon (tsp)	Milliliter (ml)
1 tsp	4.9289 ml
2 tsp	9.8578 ml
5 tsp	24.6446 ml
10 tsp	49.2892 ml
25 tsp	123.223 ml
50 tsp	246.446 ml
100 tsp	492.892 ml

Glossary

Teaspoon (tsp)

A teaspoon is a cooking volume measure equal to 1/3 of a US tablespoon, or about 4.93 ml. Modern recipes worldwide use this US-standard 5 ml teaspoon; older British and Australian cookbooks may differ slightly. Three teaspoons make one tablespoon; 48 teaspoons make one US cup; six teaspoons make one US fluid ounce.

Milliliter (ml)

A milliliter is one thousandth of a liter and exactly one cubic centimeter (1 ml = 1 cm³ = 0.001 L). It is the everyday metric unit for medication doses, beverage cans, cooking ingredients and lab work. A typical wine glass holds 175 ml; a standard espresso shot is about 30 ml; a 0.5 L water bottle is 500 ml.

Metric / SI volume

In the metric system, volume is reported in liters (everyday) or cubic meters (industrial), with millilters for fine resolution. The relations are exact powers of ten: 1 m³ = 1,000 L = 1,000,000 ml, and 1 ml = 1 cm³. The metric system is the standard worldwide for science, beverages, fuel in metric countries, and most modern recipes outside the United States.

Imperial / US Customary volume

US customary and UK imperial systems both use gallon, quart, pint and fluid ounce — but with different sizes. The US gallon is 3.785 L (128 US fl oz); the UK imperial gallon is 4.546 L (160 UK fl oz). Cooking units (tsp = 4.93 ml, tbsp = 14.79 ml, cup = 240 ml) follow the US standard in nearly all modern English-language recipes.

Related tools

Milliliters to Teaspoons

Convert ml to teaspoons — 5 ml ≈ 1 tsp (US standard)

Teaspoons to Tablespoons

Convert tsp to tbsp — 3 tsp = 1 tbsp

Tablespoons to Milliliters

Convert tablespoons to ml — 1 tbsp ≈ 14.79 ml (US)

Volume Converter

Convert volumes — ml, L, m³, cups, tbsp, fl oz, US/UK gallons and pints