How to Use Cold Brew Ratio Calculator
The Cold Brew Ratio Calculator gives you the water amount and steep time for any cold brew batch. Pick a style and enter coffee weight.
- Pick a style — Concentrate strong / medium / light, or ready-to-drink.
- Enter coffee grams — How much coarse-ground coffee you have.
- Read the recipe — The Cold Brew Ratio Calculator shows water ml, ratio, steep time, and estimated yield.
Formula & Theory — Cold Brew Ratio Calculator
The Cold Brew Ratio Calculator uses three equations:
water_ml = coffee_g × ratio
yield_ml = water_ml × 0.92
steep_h = preset_for_style| Style | Ratio | Steep |
|---|---|---|
| Concentrate, strong | 1:4 | 16 h |
| Concentrate | 1:5 | 14 h |
| Concentrate, light | 1:8 | 12 h |
| Ready to drink | 1:12 | 14 h |
| Ready to drink, light | 1:15 | 12 h |
Assumptions and Limits
The Cold Brew Ratio Calculator assumes coarse grind, room/fridge temperature, and a standard filter. Finer grinds extract faster and can over-extract.
Use Cases for Cold Brew Ratio Calculator
The Cold Brew Ratio Calculator is useful for:
- Weekly batch brewing — Plan a 1 L mason jar from a single bean weight.
- Concentrate prep — Make a small concentrate to mix with water or milk later.
- Café service — Scale a recipe up for daily café production.
- Sharing — Halve or double a friend’s recipe by entering their coffee weight.
The Cold Brew Ratio Calculator keeps your cold brew consistent batch after batch.