How to Use Coffee Ratio Calculator
The Coffee Ratio Calculator scales any brewing recipe up or down. Pick a method preset or enter a custom ratio, enter coffee or water, and read the matching number.
- Pick the brewing method — Pour over, French press, AeroPress, drip, espresso, cold brew, or custom.
- Adjust the ratio — The default reflects common practice for that method.
- Choose solve-for — Coffee → water, or water → coffee.
- Read the recipe — The Coffee Ratio Calculator shows the 1:x ratio, coffee grams, and water grams / ml.
Formula & Theory — Coffee Ratio Calculator
The Coffee Ratio Calculator uses a single equation:
water = coffee × ratio
coffee = water ÷ ratio| Method | Typical ratio (1 : x) |
|---|---|
| Pour over | 16 |
| French press | 15 |
| AeroPress | 13 |
| Drip brewer | 17 |
| Espresso | 2 |
| Cold brew | 8 (concentrate) |
Assumptions and Limits
The Coffee Ratio Calculator uses 1 ml water ≈ 1 g. Grind size, water temperature, and brew time will still affect extraction and flavour.
Use Cases for Coffee Ratio Calculator
The Coffee Ratio Calculator is useful for:
- Single cup vs carafe — Scale a recipe from 20 g to 60 g coffee.
- Switching methods — Convert a pour over recipe to AeroPress.
- Espresso dialing-in — Lock the 1:2 brew ratio on a new bean.
- Cold brew batch — Compute large-batch coffee and water grams.
The Coffee Ratio Calculator removes guesswork so every brew lands in the same flavour window.