Start with net weight, not the size of the tin
A large-looking container is not a serving count. Find the net weight printed on the label, then decide how much powder you use in each drink. Use grams for this calculation: a heaped spoon and a level spoon can hold different amounts, and the physical tin may be much heavier than the powder inside it.
Ippodo publishes a 2 g usucha example and a 3 g latte example. Those are useful planning references, not requirements for every product or cup. If your own repeatable recipe uses a different amount, use that figure instead.
| Pack weight | At 1 g | At 2 g | At 3 g |
|---|---|---|---|
| 30 g | 30 | 15 | 10 |
| 40 g | 40 | 20 | 13 full portions + 1 g |
| 100 g | 100 | 50 | 33 full portions + 1 g |
Turn portions into a realistic buying interval
For a 30 g pack at 2 g per cup, one cup every day uses the pack in 15 days. At three cups per week, 15 portions cover five weeks. If you make two 2 g drinks each day, the same pack contains seven complete days of drinks and one additional portion. These are schedules calculated from powder use, not promises that an opened pack will retain the same flavour for that long.
- Weigh a few portions of your usual recipe and choose a realistic planning amount.
- Divide net pack weight by that amount; round down if you need a count of complete drinks.
- Divide complete portions by the drinks you expect to make each week.
- Check the producer's storage advice before deciding that a larger pack is suitable for that interval.
Is the bigger pack actually cheaper for you?
Compare cost per gram, then account for how much you expect to use. In a hypothetical example, a 30 g pack costing $18 is $0.60 per gram and $1.20 per 2 g portion. A 100 g pack costing $45 is $0.45 per gram and $0.90 per portion if all of it is used. But if you use only 60 g of that larger pack, the $45 purchase supplied 30 two-gram drinks: $1.50 each. These are illustrative prices, not current market quotes.
Compare your own pack prices → Use the same portion size in both comparisons; milk and shipping may need separate accounting.
Supply and shelf life answer different questions
This worksheet cannot establish a safe storage time or an opened-pack freshness window. Keep the packaging instructions, purchase date and opening date with your notes. If your routine changes between water-only bowls and stronger lattes, recalculate consumption rather than assuming every drink uses one identical serving.
Frequently asked questions
How many lattes does 30 g make?
Ten at 3 g of pure matcha per latte, or fifteen at 2 g. Choose the figure that matches your actual recipe, not the cup's advertised size.
Does 15 servings mean the tin expires in 15 days?
No. Fifteen is the calculated number of portions. Expiry, storage and quality after opening depend on the product and its instructions.
Can I use this for sweetened matcha powder?
You can divide blend weight by blend used per drink, but the result counts portions of that blend. It does not tell you how many grams of pure matcha the portions contain.