The Grind CalcFree online tool
Chemex coffee ratio calculator
Chemex recipes commonly use 1:16 with a medium-coarse grind. Thicker filters slow flow — use a slightly finer grind than French press.
Chemex
Coffee to water ratio
Coffee
20 g
4 tbsp
Water
320 ml
10.8 fl oz
Cups
1.35
US cups
Ratio
1:16
by weight
How this ratio works
Coffee ratios are expressed by weight: 1 part ground coffee to X parts water. A 1:16 ratio means 1 gram of coffee for every 16 grams (milliliters) of water. This calculator converts between grams, tablespoons, cups, and fluid ounces so you can brew with whatever you have on hand.
Tips for chemex
- Use Chemex bonded filters; rinse thoroughly to remove paper taste.
- Pour in stages: bloom 45 s, then pulse pours to target weight.
- For brighter coffee try 1:17; for richer body try 1:15.
Frequently asked questions
What ratio for Chemex coffee?+
Chemex recipes commonly use 1:16 with medium-coarse grind. Thicker filters slow drainage — adjust grind rather than ratio if the brew runs too fast or stalls.
Chemex coffee ratio grams for 3 cup?+
A 3-cup Chemex holds about 473 ml. At 1:16, use roughly 30 g coffee. The 6-cup model (~887 ml) needs about 55 g at the same ratio.
Chemex vs V60 ratio?+
Both typically use 1:15 to 1:17. Chemex filters are thicker, so you may grind slightly finer than V60 while keeping the same ratio.
How to calculate Chemex coffee and water?+
Multiply coffee grams by 16 to get water ml, or divide water ml by 16 for coffee grams. Use the slider above to try 1:15 for bolder coffee or 1:17 for brighter notes.