Convert Water from Teaspoon to Millilitres

How many millilitres is 1 teaspoon of water?

1 teaspoon of water (H2O) is 5 millilitres. 2 teaspoons of water is 10 millilitres. 1/2 teaspoon of water is 2.5 millilitres. 1/4 teaspoon (0.25 teaspoon) of water is 1.25 millilitres. Use the converter below for any amount.

  • A teaspoon here is the 5 ml standard, the same in the UK, Europe, and Australia. A US teaspoon is fractionally smaller at about 4.9 ml. When teaspoon size matters →

Water is the most fundamental ingredient in cooking and baking. Used to hydrate doughs and batters, cook pasta and grains, make stocks and sauces, and dissolve ingredients, it appears in almost every recipe in some form. One metric cup (250 ml) of water weighs exactly 250 grams or 8.82 ounces — a clean, round number because the gram was originally defined as the mass of one millilitre of water.

Many recipes — particularly from the US — list water in cups or fluid ounces, while others use millilitres or grams. This page lets you convert water between grams, cups, millilitres, fluid ounces, and more so you can match any recipe with whatever measuring equipment you have.

Also known as

  • H2O
  • drinking water
  • tap water
  • filtered water

No measuring spoons? The tool below gets you close, and a measuring spoon set keeps small amounts accurate.

Water Measurement Converter

Enter a value and pick your units.

Result

0 Millilitres

Common Water Conversions

Here are the most common water conversions from teaspoons to millilitres.

TeaspoonsMillilitres
0.25 tsp1.25 ml
0.5 tsp2.5 ml
1 tsp5 ml
2 tsp10 ml
3 tsp15 ml
4 tsp20 ml
6 tsp30 ml
8 tsp40 ml
12 tsp60 ml

Water Conversion Chart

The conversion chart below gives a quick reference for converting water from Teaspoon to Millilitres and other measurements.

tspmlcupgramsouncescup(US)tbspfl oz
1 tsp5 ml0.02 cup5 g0.18 oz0.02 cup (US)0.33 tbsp0.17 fl oz
2 tsp10 ml0.04 cup10 g0.35 oz0.04 cup (US)0.67 tbsp0.34 fl oz
3 tsp15 ml0.06 cup15 g0.53 oz0.06 cup (US)1 tbsp0.51 fl oz
4 tsp20 ml0.08 cup20 g0.71 oz0.08 cup (US)1.33 tbsp0.68 fl oz

Frequently Asked Questions

How many millilitres is 1 teaspoon of water?
1 teaspoon of water is 5 millilitres. The ratio is fixed, so 2 teaspoons of water is 10 millilitres and 0.5 teaspoons is 2.5 millilitres. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the water converter
How many millilitres is 1.5 teaspoons of water?
1.5 teaspoons of water is 7.5 millilitres. The ratio is fixed, so 1 teaspoon of water is 5 millilitres and 2 teaspoons is 10 millilitres. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many millilitres is 2 teaspoons of water?
2 teaspoons of water is 10 millilitres. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 teaspoon of water is 5 millilitres, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact millilitres reading.
How many teaspoons of water is 5 millilitres?
5 millilitres of water is 1 teaspoon. The conversion works the same in reverse, so you can switch between millilitres and teaspoons without changing the result. This helps when a recipe lists teaspoons but you would rather weigh or measure in millilitres. The converter above and the chart below cover both directions for any amount.
How many millilitres is 1 teaspoon of H2O?
H2O is another name for water, so 1 teaspoon of H2O is 5 millilitres, exactly the same as water. The figure does not change with the name: 2 teaspoons is 10 millilitres and 0.5 teaspoons is 2.5 millilitres. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Are water and H2O the same thing?
Yes. H2O is another name for water, so they are the same ingredient and convert identically. 1 teaspoon of water is 5 millilitres under either name, and 2 teaspoons is 10 millilitres. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
How many millilitres is 1/2 teaspoon of water?
1/2 teaspoon of water is 2.5 millilitres. The ratio is fixed, so 1 teaspoon of water is 5 millilitres and 2 teaspoons is 10 millilitres. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart below for the common ones.
How many millilitres is 1/4 teaspoon of water?
1/4 teaspoon (0.25 teaspoon) of water is 1.25 millilitres. The ratio is fixed, so 1 teaspoon of water is 5 millilitres and 2 teaspoons is 10 millilitres. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

Other Ingredients

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