Break-Even Thinking: How Many Matcha Drinks Justify a 1 kg Bag?

A 1 kg bag makes sense when you use it up within the period you are happy to keep an opened bag. The break-even question is not "is it cheaper per gram?" but "will we finish it while it still meets our standard?" Divide the usable grams by your weekly use to get weeks to finish, then compare that with your own freshness target. The tables below do the arithmetic for common weekly volumes; the target is a number you set for your bar.

The two numbers you need

1. Weeks to use a bag. This is the stock-duration formula with a week instead of a day:

Usable quantity = purchased × (1 − loss %)

Weeks to use = usable quantity ÷ weekly use

Weekly use = drinks per week × grams per drink

2. Your freshness target. How many weeks you are willing to work from one opened bag before quality drops below your own standard. This depends on your storage, how often the bag is opened and how you judge colour and flavour. Yumi does not state a period here; check the pack and the B2B FAQ for the product's best-before information, and see best-before date vs freshness after opening for how to think about the two.

Write yours down: your freshness target after opening = ___ weeks.

Weeks to use a 1 kg bag (milk drinks)

For Ceremonial Barista Matcha in a 1 kg bag at an example dose of 2 g and an example loss of 8% (replace both with your own figures), the usable quantity is 1,000 × (1 − 0.08) = 920 g.

Matcha drinks per week	Weekly use	Weeks to use	Arithmetic
25	25 × 2 = 50 g	18.4	920 ÷ 50
50	50 × 2 = 100 g	9.2	920 ÷ 100
100	100 × 2 = 200 g	4.6	920 ÷ 200
150	150 × 2 = 300 g	3.1	920 ÷ 300
200	200 × 2 = 400 g	2.3	920 ÷ 400
300	300 × 2 = 600 g	1.5	920 ÷ 600

At a higher dose the bag goes faster: at 3 g, 100 drinks a week use 300 g, so 920 ÷ 300 = 3.1 weeks.

Weeks to use a 1 kg bag (pure serves)

A pure serve with Ceremonial Matcha often sells in smaller numbers. Same example assumptions (2 g, 8% loss, 920 g usable):

Pure serves per week	Weekly use	Weeks to use
10	20 g	920 ÷ 20 = 46
20	40 g	920 ÷ 40 = 23
40	80 g	920 ÷ 80 = 11.5
80	160 g	920 ÷ 160 = 5.75

This is why a café that sells a few pure serves a week should check the numbers before ordering a 1 kg bag for them.

The break-even volume

Turn it round to find the minimum weekly volume that finishes a bag within your target:

Minimum drinks per week = usable grams ÷ (grams per drink × your target in weeks)

With 920 g usable and 2 g per drink, that is 920 ÷ (2 × W) = 460 ÷ W, where W is your target. The table is arithmetic for different values of W, not a recommendation for any of them.

If your target is W weeks	Minimum drinks per week (rounded up)
4	460 ÷ 4 = 115
8	460 ÷ 8 = 57.5 → 58
12	460 ÷ 12 ≈ 38.3 → 39

Decision rule: order, adjust or pause

Situation	What to do
Weeks to use is comfortably below your target	Order the 1 kg bag; set a reorder point (see reorder point and safety stock)
Weeks to use is close to your target	Order, but store carefully: small working tin, main bag sealed between refills
Weeks to use is above your target	Review before ordering: push matcha on the menu, add a second matcha drink, or pause the serve
Volume is unknown (new menu item)	Test with samples first, then order 1 kg once you have a few weeks of sales data

If you have two products, run the calculation separately for each bag. A latte bag may turn over well while a pure-serve bag does not.

Why samples are not a long-term supply

Samples exist to test, not to supply a menu. At €4.95 per 10 g, a sample costs €4.95 ÷ 10 = €0.495 per gram, against €195.00 ÷ 1,000 = €0.195 per gram for a 1 kg bag (all excl. VAT, at the time of writing, November 2026; check the product page for the current price). That is about 2.5 times the per-gram cost. Once a recipe is settled and you know your weekly volume, the 1 kg bag is the working format. Pack-size questions in general are covered in 1 kg bags vs small tins.

Fill-in worksheet

Line	Your value	Example
A. Drinks per week	___	100
B. Grams per drink	___	2
C. Loss % (decimal)	___	0.08
D. Usable grams = 1,000 × (1 − C)	___	920
E. Weekly use = A × B	___	200
F. Weeks to use = D ÷ E	___	4.6
G. Your freshness target (weeks)	___	your figure
H. Order 1 kg if F is below G	yes / no

For turning weekly use into a monthly budget and kilos per month, see the monthly matcha budget.

Next step

Fill in the worksheet with last month's matcha sales. If you are starting from zero, order both 10 g samples to settle your recipe, then move to the 1 kg bag once the weekly volume supports it.