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.
From the blog
What Is Drip Bag Coffee? How Single-Serve Pour Over Works
Drip bag coffee is a single-serve pour over in a hang-on-your-mug filter. Here is how it works, how it tastes, and how it compares to instant, pods, and a full pour-over setup.
Drip Bag Coffee vs Instant: Is It Really Better?
Drip bags and instant coffee both promise a fast cup with no machine — but they are not the same. Here is how they compare on taste, convenience, caffeine, and cost.
Drip Bags vs Coffee Pods: Cost, Taste & Waste Compared
Coffee pods need a machine and leave plastic behind; drip bags need only hot water and are mostly paper. Here is how they compare on taste, cost per cup, and waste.
Are Drip Coffee Bags Worth It? An Honest Take
Drip bags promise café-quality coffee with no machine — but are they worth the price? An honest look at the pros, the real drawbacks, and exactly who should buy them.
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