Better coffee starts with the right ratio.
Free calculators and clear, tested guides for every brew method — dial in your coffee-to-water ratio, track your caffeine, and see what your habit really costs.
Coffee calculators
Instant answers, no sign-up.
Coffee Brew Ratio Calculator
Enter your water and ratio to get the exact grams of coffee for a perfectly balanced cup — for any brew method.
Cold Brew Ratio Calculator
Get the exact coffee and water for smooth cold brew — as a strong concentrate or ready-to-drink batch.
Caffeine Intake Calculator
Add up your daily caffeine across espresso, drip, cold brew, and more — and see how it compares to the FDA limit.
Caffeine Half-Life Calculator
See how much caffeine is still in your system at bedtime — and whether that afternoon coffee will cost you sleep.
Coffee Cost Calculator
See what your café habit really costs per year — and how much you’d save (or invest) by brewing at home.
Drip Bag Coffee Calculator
Enter your bags and mug size to get the exact water, strength, and caffeine for single-serve drip bags — and fix a weak cup instantly.
Explore by topic
Brewing Guides
Dialed-in recipes, ratios, and technique for every brew method — from pour over and French press to espresso and cold brew.
Coffee Drinks
Every drink on the menu, explained — milk drinks, black coffee, specialty builds, and the side-by-side comparisons people search for most.
Caffeine & Health
How much caffeine is really in your cup, how your body handles it, and what the research says about coffee and health.
Beans & Gear
The inputs that decide your cup — choosing and storing beans, grinding right, picking equipment, and keeping it clean.
Coffee Gifts
Coffee gift guides for every budget and occasion — gift sets, samplers, subscriptions, and the picks coffee lovers actually want.
From the blog
Best Drip Bag Coffee Subscriptions in 2026
A drip bag subscription delivers single-serve pour over bags to your door on a schedule. Here’s what to look for, what it costs, and the best plans for daily drinkers and gift givers.
Best Gooseneck Kettles for Pour Over Coffee
A gooseneck kettle gives you the slow, steady pour that pour-over coffee demands. Here are the features that matter and picks at $30, $60, and $100+.
Japanese Iced Coffee: The Flash-Brew Method
Japanese iced coffee brews hot coffee directly onto ice, locking in bright aromatics that cold brew loses. Use a 1:15 ratio with 40 % ice and 60 % hot water for a perfect glass.
Best Last-Minute Coffee Gifts That Ship Fast
Forgot a birthday or holiday? These coffee gifts ship in 1–2 days or arrive instantly as digital gifts — from e-gift subscriptions to next-day drip bag sets.
Stop guessing your coffee.
Grab a scale, pick a ratio, and make the same great cup every morning. Start with the golden ratio.
Open the Brew Ratio Calculator