Matcha to Water Ratio Calculator
Measure matcha and water the traditional way — thin usucha, thick koicha, or a matcha latte — with grams, teaspoons and millilitres for any number of servings.
How it works
Usucha ≈ 2 g : 70 ml · Koicha ≈ 4 g : 40 ml · Latte ≈ 2 g : 60 ml water + 180 ml milk · (~2 g matcha per tsp)
Matcha is powdered green tea whisked directly into water rather than steeped, so the ratio of powder to water defines the drink. Usucha ("thin tea") uses roughly 2 g of matcha to about 70 ml of hot water for a light, frothy everyday cup. Koicha ("thick tea") doubles the powder into far less water for a syrupy, intense ceremonial preparation and needs top-grade matcha. A latte starts like usucha but with a little less water, then extends into steamed milk. Use water around 70–80°C, not boiling, and whisk briskly in a "W" motion to raise a fine foam without scorching the tea.
Worked example
For 2 servings of usucha: matcha = 2 × 2 g = 4 g (about 2 tsp) and water = 2 × 70 = 140 ml. Sift the powder, add the 70–80°C water and whisk each cup until frothy.
Frequently asked questions
What water temperature should I use?
Aim for about 70–80°C (160–175°F). Boiling water scorches matcha, turning it bitter and dull green. If you do not have a thermometer, boil the kettle and let it sit for a couple of minutes, or mix in a splash of cool water before whisking.
What is the difference between usucha and koicha?
Usucha (thin tea) is the frothy, everyday preparation — more water, less powder. Koicha (thick tea) uses about double the matcha in much less water for a thick, intense result served in formal tea ceremony, and it demands the highest ceremonial-grade matcha because there is nowhere for off-flavours to hide.
How much matcha is in a teaspoon?
A level teaspoon of matcha is roughly 2 g, though the fine powder compresses easily, so weighing on a small scale is more accurate. A traditional bamboo scoop (chashaku) holds about 1 g, so a usucha serving is around two scoops.
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This calculator is for educational purposes. Double-check important results before acting on them.