Coffee & Tea 1:8
Cold Brew Calculator
What's the ratio for cold brew? 1 part coffee to 4 to 8 parts water for concentrate, then dilute.
Make cold brew without guessing: enter your coffee or how much you want to drink, pick the strength, and get the water, steep time and yield.
How to use it
- Enter your coffee, or how much cold brew you want.
- Pick the concentrate strength and how you'll dilute it.
- Steep 12 to 24 hours in the fridge, then strain.
How it works
Water = coffee × the ratio. The grounds hold back about twice their weight.
Concentrate is diluted to taste.
Cold brew has no official standard; these ratios and times are our starting point.
Assumptions and limits
- Coarse grind.
- Steeped in the fridge.
- 1 g of water = 1 mL.
Sources reviewed October 23, 2026.
Tips
- Use a coarse, even grind for a clean strain.
- Keep concentrate covered in the fridge up to a week.
- Add vanilla syrup or sweet cream to taste.
Recipes to try it with
Questions
What's the ratio for cold brew?
1 part coffee to 4 to 8 parts water for concentrate, then dilute.
How long should cold brew steep?
12 to 24 hours in the fridge.
How much cold brew does 100 g of coffee make?
About 600 mL of concentrate at 1:8, or 1.2 L diluted 1:1.