Coffee Brew Ratio Calculator
Works out the coffee and water for a brew, by weight, at the ratio your method calls for.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
coffee = water ÷ ratio water = coffee × ratio
Ratios are by weight, and a millilitre of water weighs a gram. Grounds keep about twice their weight in water, so the cup holds a little less than you poured.
What to watch out for
These ratios are starting points. A lower number makes a stronger cup. Change the ratio to change the strength, and the grind to change how it tastes.
Frequently Asked Questions
How much coffee for 500 ml of water?
About 31 g at 1:16, a common pour-over ratio.
How much coffee per cup?
For a 250 ml mug, about 16 g at 1:16. Weighing beats scoops, because a scoop’s weight varies with the roast and grind.
What is the French press ratio?
About 1:15, or 67 g of coarse coffee to a litre of water.