Free brew calculators
No accounts, no uploads — everything runs in your browser. Use these to lock a repeatable recipe and see what your coffee habit really costs.
Brew Ratio Calculator
Fill any two fields; we solve the third. 1:16 is a balanced filter start; 1:15 stronger, 1:18 lighter.
Cost-per-Cup Calculator
See what each cup costs you versus a cafe.
Want better coffee at home?
The right gear is what turns cheap beans into cafe-quality cups. Start with one:
Coffee maker Grinder Reusable filter Beans
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Cold Brew Calculator
Concentrate ratio is typically 1:8 (coffee:water). Fill any two fields; we solve the third and estimate servings after a 1:1 dilution.
Caffeine Calculator
Estimate the caffeine in your cup by brew method and size. Figures are typical averages per 8 oz (237 ml) serving.
Espresso Yield Calculator
Espresso is measured by yield, not just water. Enter the dose and your target ratio (1:2 is a classic, bright start) to get the liquid yield in the cup.