ffee
All tools
Coffee Ratio Calculator
Work out exactly how much water your coffee needs at any brew ratio.
Coffee to water ratio
Coffee: — g · water: —
g
Ratio: —
Strength: — · —
Water volume: — ml
How to use the Coffee Ratio Calculator
- Choose whether you know the coffee weight or the water weight.
- Set the ratio, or pick a brew method to load a typical ratio for it.
- Read the missing weight in grams, along with the strength and coffee per litre.
Features
- Works out either coffee or water from the other value
- Common ratios from espresso to filter coffee
- Strength note and coffee grams per litre
- Runs locally, no uploads and no tracking
Advertisement
Frequently Asked Questions
Common questions about the free online coffee ratio calculator.
One to sixteen is the usual starting point for filter coffee, which means 20 g of coffee to
320 g of water.
At a 1 to 16 ratio you need 320 g of water, and at 1 to 15 you need 300 g, since water is
simply ratio times coffee.
Espresso runs from about 1 to 1.5 for a ristretto to 1 to 2.5 for a standard double shot,
measured in the cup.
French press usually sits around 1 to 12 up to 1 to 15, and it tastes heavier because the
metal filter keeps the oils.
Yes. More water extracts more and thins the body, while less water concentrates the cup and
can taste sour if under extracted.
Almost exactly, so you can treat water weight and volume as the same number when you brew.
At 1 to 16 that is about 62.5 g of coffee, which is why a litre batch brew is usually made
with 60 to 65 g.
Weighing is far more consistent, because a scoop of ground coffee varies a lot with the grind
and how it is packed.
No. Everything is calculated in your browser and nothing you type is ever sent to a server.
Yes. It is completely free, needs no account and has no limit on how many brews you plan.
Last updated: October 10, 2026