Use 2 grams of matcha per cup — about one level teaspoon, or two scoops with a traditional bamboo chashaku — whisked into 60 to 80 ml of water. That's the standard usucha ratio, and it's the right starting point for almost everyone. Every other matcha drink is a variation on that number, and most of the variations go up or down by a gram. Here's the full chart, the conversions, and the two mistakes that ruin more bowls than bad matcha does.
The standard: 2 g per cup
The traditional Japanese preparation — usucha, or 'thin tea' — uses 2 g of matcha to roughly 70 ml of water. That concentration is not arbitrary: it's strong enough for the umami and sweetness to register, dilute enough that the bitterness stays a background note. Below about 1.5 g the flavor goes thin and watery; above 3 g in the same water, bitterness takes over unless you're using a high grade.
If you're new to matcha, start at 1.5 to 2 g and adjust from there. Your spoon calibrates quickly — after a week of measuring, you'll eyeball it accurately.
Ratio chart for every matcha drink
- Usucha (standard bowl): 2 g matcha, 60–80 ml water at 70–80 °C.
- Koicha (thick tea): 4 g matcha, 30 ml water — kneaded, not whisked, and only with top ceremonial grades.
- Hot matcha latte: 2 g matcha whisked in 30 ml water, then 240 ml of steamed milk.
- Iced matcha latte: 3 g matcha — cold mutes flavor, so go stronger than you would hot.
- Matcha lemonade: 2 g matcha over 60 ml lemon juice, sweetener, and 200 ml cold water.
- Smoothies and baking: 2–4 g per serving — other ingredients bury anything less.
Grams, teaspoons, and chashaku scoops
Matcha is light and fluffy, so spoon measurements are less precise than they feel. The working conversions:
- 1 level teaspoon ≈ 2 g — the standard single-cup dose.
- 1 heaping teaspoon ≈ 4 g — a koicha dose, and double the caffeine you probably intended.
- 1 chashaku (bamboo scoop) ≈ 1 g — traditional recipes call for two scoops per bowl.
- 1 level tablespoon ≈ 6 g — three cups' worth. Nobody needs a tablespoon of matcha in one drink; if a recipe calls for one, it's a smoothie or a batch of baked goods.
Measuring without a scale
A $15 pocket scale accurate to 0.1 g is the honest answer, but a level teaspoon gets you close enough for daily drinking. The technique matters: scoop, then drag the flat of a knife (or the spoon's own handle) across the rim to strike it level. A casually scooped 'teaspoon' of matcha is nearly always heaping, and a heaping teaspoon is a double dose.
That's worth repeating, because it's the single most common matcha mistake: heaping spoons are the #1 cause of bitter, harsh bowls — and of tins that empty twice as fast as they should. Most 'I don't like matcha' verdicts trace back to a 4 g dose that was meant to be 2.
How the dose changes caffeine
Caffeine scales linearly with powder, not with water: 2 g of matcha carries roughly 66 mg of caffeine, and 4 g carries about 130 mg — koicha sits in drip-coffee territory. Half a teaspoon (1 g) is a gentle ~33 mg. The full teaspoon-by-teaspoon breakdown is in our caffeine-per-teaspoon guide, and the calculator converts any dose to coffee-cup equivalents.
Adjusting strength without wrecking the flavor
If a bowl tastes too strong, add water before you cut powder — dropping from 70 ml to 90 ml softens intensity while keeping the flavor profile intact. If it tastes too weak, the reverse: less water first, more powder second. Changing the powder dose shifts the flavor balance itself (more powder pushes bitterness disproportionately), while changing water just dilutes or concentrates what's already working.
Grade sets your ceiling here. Ceremonial-grade matcha stays smooth at 3 g in a small bowl; culinary grade turns harsh past 2 g in anything but a milk drink. If you want strong plain matcha, the grade matters more than the ratio.
Frequently asked
How much matcha for a 12 oz cup?
For a 12 oz (355 ml) latte or iced drink, use 3 g — about 1.5 level teaspoons. Straight matcha isn't drunk at 12 oz volumes; if you want a big cup of plain matcha, 2.5 to 3 g in 250 ml of water is as far as most palates enjoy before it thins out or turns harsh.
Can I use half a teaspoon of matcha?
Yes — 1 g in 50–60 ml of water makes a light, low-caffeine (~33 mg) bowl that's a good entry point for new drinkers and a good afternoon option for the caffeine-sensitive. It will taste noticeably milder than a standard bowl; that's the point.
Does more matcha mean more health benefits?
Proportionally, yes — double the powder is double the catechins, L-theanine, and caffeine. But the practical ceiling arrives fast: past 4–6 g a day you're mostly adding caffeine load and cost, not wellbeing. Two standard bowls a day captures what matcha has to offer.
How much matcha per day is safe?
For healthy adults, the FDA's 400 mg/day caffeine ceiling works out to roughly six 2 g bowls — far more than anyone drinks. Two to three bowls (4–6 g) is a comfortable daily range. Pregnant drinkers should stay under 200 mg of caffeine per day from all sources — about three bowls with no other caffeine; our matcha-and-pregnancy guide covers the details.
What happens if I use too much matcha by accident?
Nothing dangerous at typical kitchen-mistake levels — a heaping-instead-of-level teaspoon (roughly 4 g instead of 2 g) just gives you a stronger, more bitter bowl and about double the caffeine (~130 mg instead of ~66 mg). If it tastes too intense, add more water rather than pouring it out; that fixes the flavor even though the caffeine dose stays the same. A genuinely large overshoot — several teaspoons in one sitting — mainly risks jitters and an upset stomach, the same as too much coffee, not a specific matcha danger.
Do different matcha grades need different ratios?
The gram amount stays the same; what changes is how forgiving the grade is at that amount. Ceremonial grade stays smooth even pushed slightly stronger than the 2 g standard, because the amino acids that create sweetness scale with it. Culinary grade turns sharp fast past 2 g in plain water — its ratio is really a ceiling, not a target. That's exactly why culinary grade is sold for lattes and baking: milk, sugar, and other ingredients absorb the extra bitterness that plain water can't.