Bag sizes look like a simple bigger-number-cheaper-coffee decision, and that is exactly how people end up with a kilo of stale beans and a theory that the roaster went downhill. The right size has nothing to do with the discount and everything to do with one question: how much do you actually drink in a month?
In one sip: work out your weekly grams, pick the bag you will finish within about a month of roast, and ignore any saving that leaves beans going stale.
The only maths you need
A double shot uses around 17 to 18 grams of beans. One coffee a day is therefore roughly 125 grams a week. Two a day, about 250 grams a week. A filter or plunger habit lands in a similar range per person. Multiply by the humans in the house and you have your weekly number. Everything else follows from it.
Quick facts
| Bag | Roughly | Suits |
|---|---|---|
| 250g | ~14 double shots | One casual daily drinker, or trying a new coffee |
| 500g | ~28 double shots | One serious drinker, or a light two-person household |
| 1kg | ~55 to 60 double shots | A two-coffee-a-day household, finished in about a month |
| 2kg | ~110 or more | Big households, offices, the seriously committed |
The freshness ceiling
Here is the catch that undoes the bulk-buy logic. Beans drink best within about a month of roasting. A bag you cannot finish inside that window is not a bargain, it is a slow-motion waste, because the per-gram saving on the label gets cancelled by the flat, lifeless cups at the bottom of the bag. The cheapest coffee you can buy is the one you drink at its peak.
The trying-something-new rule
One more honest tip: never buy big on a coffee you have not tasted. Take the 250g of anything new from the range, live with it for two weeks, and upgrade the size once it has earned a place in the rotation. Your future self, staring at 2kg of a coffee you turned out not to love, will thank you.
If you never want to do this maths again
This sizing question is exactly what the Brew Club solves: pick your size and your frequency, weekly, fortnightly or monthly, take a flat 20 per cent off every order, and skip or pause whenever life changes. The right amount of fresh coffee just keeps arriving, and the mental arithmetic retires.
FAQ
How many coffees in a 250g bag?
Around 14 double shots at a typical dose, roughly two weeks of one daily coffee.
Is a bigger bag always better value?
Only if you finish it within about a month of roast. Stale savings are not savings.
What size for two coffees a day?
About 250g a week, so a 1kg bag a month sits right on the freshness window.
