Coffee Ratio LabFree coffee calculators
Quick, accurate math for better coffee. Works on any phone.
Coffee is a recipe: a little math turns a guess into a repeatable cup. These free tools work out how much coffee and water to use, how strong to dilute cold brew, how much caffeine you've had, what home coffee really costs compared with the café, when your beans will go stale, and what to change when your coffee tastes wrong. No sign-up needed, and they work on any phone.
All 6 calculators
Coffee ratio calculator
Free coffee to water ratio calculator. Pick your brewer and mug size to get grams of coffee, tablespoons and water — for drip, French press, pour over and more.
Caffeine calculator
Add up the caffeine in your espresso, drip coffee, cold brew, tea and energy drinks, and compare your total with the commonly cited 400 mg daily guideline.
Cold brew dilution calculator
Work out exactly how much cold brew concentrate and water or milk to use for your glass, based on your concentrate ratio and the strength you like.
Fix my coffee troubleshooter
Pick your brew method and what's wrong with your cup. Get a ranked list of fixes for bitter, sour, weak, muddy, stale or burnt coffee — specific to your brewer.
Coffee cost calculator
Work out your cost per cup at home vs buying coffee out, your yearly spend, how much you'd save and how quickly a coffee maker or grinder pays for itself.
Coffee freshness calculator
Enter your roast date, bag size and how much you drink. See when the bag runs out, whether it stays fresh until then, how much to freeze and when to reorder.