What is the best cold brew ratio?

For concentrate, use 1:8 (one part coffee to eight parts water) and dilute it 1:1 when you serve. For ready-to-drink straight from the jar, use about 1:12 to 1:15.

How long should cold brew steep?

12 to 24 hours. Twelve hours at room temperature or up to 24 in the fridge. Longer steeps pull more strength but can turn woody past a day, so taste and stop when it is right.

Hot bloom or fully cold?

Fully cold is the classic method and gives a smoother, less acidic cup. Use a coarse grind and filter through a paper filter or cloth to keep it clean.

Cold brew

Cold Brew Ratio Calculator

Cold brew steeps coarse coffee in cold water for 12 to 24 hours. A 1:8 ratio makes a strong concentrate you dilute 1:1 with water or milk. A 1:12 ratio brews closer to ready-to-drink.

Water (grams)

~250 g water per cup

Ratio1:8.0

1:4.0 (stronger)1:12.0 (lighter)

125 g

coffee for 1000 g water at 1:8.0

Brew it better

The ratio is free. The taste comes from fresh beans and a consistent grind. Here is what we actually use.

Get fresh beans Shop grinders and scales

Gear we use

The ratio is only as good as the grind and the pour. Here is the gear that makes this brew repeatable.

Cold brew maker Burr grinder

We earn a commission on Amazon purchases through these links.

How to use it

01
Set your water
Enter your water. For a 1 liter jar, start with 1000 grams.
02
Pick concentrate or ready-to-drink
Use 1:8 for a concentrate you will dilute, or 1:12 for ready-to-drink.
03
Steep and filter
Weigh the coffee shown, grind coarse, steep 12 to 24 hours, then filter.

Frequently asked

More brew tools

Pour over / drip French press Pour over Espresso