40 g or 100 g? How Long a Tin of Matcha Actually Lasts

Two sizes sit side by side, and the cheaper-looking one is not always the smarter buy. The real question is how long does 100g matcha last at the rate you actually drink it — and whether a 40 g tin would have been finished fresher. One number settles it: a standard bowl uses 1 teaspoon, about 2 grams.

The basic count: 20 bowls or 50

Divide by that 2-gram serving and the sizes stop being abstract: a 40 g tin makes about 20 bowls, a 100 g pouch about 50. Our own pages agree: Hikari, a first-harvest Ceremonial — Superior from Kyoto at $26 for 40 g, lists 20–25 servings, while our Camellia Premium Barista lists 50–75 servings for its 100 g pouch at $39.90. The ranges exist because a serving can run 1–2 teaspoons.

Koicha and daily habits change the answer

Drink thick koicha and you use 2 teaspoons, about 4 grams, so every count halves: roughly 10 bowls from 40 g, 25 from 100 g. Lattes still use 1 teaspoon whisked strong before the milk, so they count like a normal bowl. Pace matters too: one bowl a day empties 40 g in about three weeks and 100 g in about seven; two drinkers in one house finish the big pouch in under a month.

The freshness clock is the real limit

Both pages above give matcha a year unopened — and say it is best within 4 weeks of opening. That is the honest catch with 100 g: at one bowl a day, its last weeks sit past the brightest window. Daily drinkers and two-person households finish it while it is still vivid. Whisk twice a week, and a 40 g tin finished fresh beats a fading big pouch — the same point we make in our guide to choosing ceremonial matcha in Canada.

Quick checklist

• Count your pace first: bowls per week × about 2 g is your real usage
• Choose 100 g if you will finish it in roughly 4–6 weeks
• Choose 40 g if you drink occasionally, or are trying a grade for the first time

Price follows the same maths: Hikari is near $1.30 a bowl at 40 g and about $1.04 at 100 g; Camellia is near $0.80. Buy the size your habit can finish bright — start with a 100 g pouch if matcha is already a daily ritual. Orders over $75 ship free across Canada.