A coffee storage routine should be easy enough to follow while the kettle heats. Keep the coffee protected, measure what you need and close it again. Pair that habit with a bag size your household will actually use.
Choose the storage spot first
The National Coffee Association recommends keeping coffee in an opaque, airtight container in a cool, dark place. Air, moisture, heat and light work against flavor. A cupboard away from the oven is a better starting point than a sunny windowsill. See its coffee storage guide for more detail.
Use a clean, dry scoop and close the container after measuring. If you transfer coffee out of the bag, keep its label with it so the name and date information remain easy to find. Give different coffees separate containers so you can choose what to brew.
Match the bag to your brewing habit
Work from the amount of dry coffee you use per batch. A 12-ounce bag contains about 340 grams. At 20 grams per brew, that is roughly 17 brews; at 30 grams, roughly 11. A 4-pound bag contains about 1,814 grams, or about 60 brews at 30 grams each. These are planning estimates, with a little variation for measuring and waste.
Now add your schedule. If you brew 30 grams once a day, that 12-ounce bag lasts around 11 days. If you make the same batch twice a week, it lasts roughly five to six weeks. The coffee has not changed; the household’s pace has.
For someone exploring a new flavor, a smaller bag makes it easier to decide whether to reorder. A larger bag can suit a household that already knows its favorite and brews often. Dwarven Dawn lists both 12-ounce and 4-pound formats, so you can apply the calculation directly.
Keep a simple rotation
Write the opening date somewhere visible. Put the coffee you mean to finish first at the front and leave the next bag sealed until you need it. If two people buy coffee for the same kitchen, keep a short shared list of what is already open.
Avoid turning the cupboard into a collection of half-finished bags. When several coffees appeal to you, decide which two you will actually brew this week and save the others for another order.
Storage helps protect the coffee you bought. Buying an amount that fits your routine makes that job easier, and gives you a useful answer the next time you wonder which bag size to choose.