Free Coffee Tools
Interactive brew-ratio calculators, grind-size references, and dialing-in charts. Built for home baristas and anyone who'd rather weigh the dose once than guess every morning. No signup, no ads, no analytics — every tool runs on your device.
Coffee Water Temperature Calculator
Your target brew temp by method and roast — plus the exact temperature water boils at your elevation, whether the standard range is even reachable there, and how long to rest the kettle off the boil.
Open toolCaffeine Intake Calculator
Tap the coffee, tea, and energy drinks you've had and get your total against a daily limit built around your weight and life stage — plus a decay timeline showing how long it stays in you for sleep.
Open toolCaffeine Half-Life Calculator
Enter what you drank, when, and your metabolism — see caffeine's full decay curve, the clock time it drops below the sleep line, how much is left at bedtime, and a 50%→99% elimination schedule.
Open toolCoffee Grind Size Chart
Pick your brew method and get the grind size, the micron range, an everyday texture match, and how to dial it in — Turkish to cold brew, with an interactive spectrum and a printable chart.
Open toolCoffee to Water Ratio Calculator
Every brew method's ratio in one tool — start from cups (real cup sizes), water, or the coffee you have, with espresso dose-to-yield, a 1–12 cup batch table, and grams/tablespoons/scoops output.
Open toolInteractive Coffee Flavor Wheel
Click the notes you taste — berry, cocoa, floral, smoke — and get a matching roast level, origin, and beans to buy. The SCA flavor wheel, made interactive.
Open toolCold Brew Coffee Ratio Calculator
Enter your jar size and get the grams of coffee, the ratio, your concentrate yield, and how many servings it makes after dilution — concentrate or ready-to-drink.
Open toolFrench Press Coffee Ratio Calculator
Enter your water and get the exact grams of coffee, the ratio, and tablespoons — for French press, pour over, drip, AeroPress, and Moka pot.
Open tool