Cold Brew Ratio Calculator

Cold brew uses a strong ratio (often 1:8 for concentrate, diluted before drinking).

How the Math Works

The Cold Brew Ratio Calculator uses a simple but powerful mathematical relationship: coffee = water ÷ ratio. This formula tells you how much coffee grounds you need based on how much water you're using and your preferred strength ratio. For example, if you're using 32 ounces of water and a 1:8 ratio, you'd calculate 32 ÷ 8 = 4 ounces of coffee grounds. The ratio represents how many parts water to one part coffee, making it easy to scale any recipe up or down while maintaining perfect balance.

Practical Applications

To use this calculator practically, first decide how much water you want to use for your cold brew, then choose your preferred strength ratio (most people use ratios between 1:6 and 1:12). Enter these values into the calculator, and it instantly tells you the exact weight of coffee grounds needed. Whether you're making a small 8-ounce concentrate or a large gallon batch, you can input your water amount and get precise results that eliminate guesswork and ensure consistent quality every time.

Day-to-Day Use

This calculator removes the frustration of cold brew calculations in your daily routine. No more guessing how much coffee to use or ending up with bitter, overpowering brews because you used too much ground coffee. Whether you're preparing cold brew for the week ahead, adjusting recipes for different serving sizes, or experimenting with strength preferences, having the exact measurements saves time, reduces waste, and helps you enjoy perfectly balanced coffee whether you're making it for yourself or entertaining guests.

Worked example

1,000 g water at 1:8 → 125 g coffee.

FAQ