Coffee-to-Water Ratio Chart: Measurements for 1, 2, 4, and 8 Cups

A coffee-to-water ratio is a recipe stated by weight: grams of coffee compared with grams of water. Because 1 milliliter of water weighs about 1 gram for everyday brewing, the tables below use milliliters and grams interchangeably for water.

Serving definition: one cup in this guide means 250 mL of brew water, not a coffee-maker “cup.” The water is an input measurement, so the beverage in your cup will weigh less after grounds retain some water.

Coffee-to-water ratio quick chart: 1, 2, 4, and 8 cups

Choose the strength that suits your coffee, then weigh both ingredients. The recipes below use 1:15, 1:16, and 1:18 as coffee-to-water ratios.

Water / servings	1:15, fuller	1:16, balanced	1:18, lighter
250 mL / 1 cup	16.7 g coffee	15.6 g coffee	13.9 g coffee
500 mL / 2 cups	33.3 g coffee	31.3 g coffee	27.8 g coffee
1,000 mL / 4 cups	66.7 g coffee	62.5 g coffee	55.6 g coffee
2,000 mL / 8 cups	133.3 g coffee	125.0 g coffee	111.1 g coffee

Calculation: coffee dose = water weight ÷ ratio. For example, 500 mL ÷ 16 = 31.25 g; the chart rounds to 31.3 g. A scale that reads to 0.1 g is useful for the smallest recipes.

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Choosing your coffee-to-water ratio

The Specialty Coffee Association’s home-brewer requirements begin testing at 55 g of coffee per liter of water, approximately 1:18. This is a standardized test starting point, not a rule that every coffee or brewer must taste best at that ratio.

For a practical home recipe, begin at 1:16. If the brewed coffee tastes thin to you, keep water fixed and use the 1:15 dose next time. If it tastes too concentrated, try 1:18. Change one variable at a time so you know what improved the cup.

Recipes by brewing method

Method	Starting recipe	Water temperature	Timing guidance
Pour-over	20 g coffee : 320 mL water (1:16)	93–96°C	Pour steadily; evaluate the brew rather than chasing a fixed time.
Automatic drip	55 g coffee : 1,000 mL water (about 1:18)	Follow the brewer’s design	Use the brewer’s capacity and adjust grind only after the ratio is set.
French press	30 g coffee : 480 mL water (1:16)	93–96°C	Start around 4 minutes, then adjust grind and steep time to taste.
AeroPress-style immersion	15 g coffee : 240 mL water (1:16)	Use a recipe suited to your method	Recipe variables vary widely; record your chosen time and agitation.

These are starting recipes, not results from a controlled comparison. Grind, water, roast, and equipment affect extraction. The same ratio can taste different when one of those changes.

For café service, record the chosen dose and water quantity on a recipe card. Our portion-control and waste-reduction training guide can help your team use those measurements consistently.

Use the ratio with a coffee-maker scale

Many coffee makers label a “cup” as 125 mL. If your machine uses that convention, four machine cups equal 500 mL, or two 250 mL servings in this guide. Read the brewer’s water markings, then use the calculation rather than assuming its cup number matches a mug.

For a faster calculation, use the Caffeine Brothers Coffee-to-Water Ratio Calculator. Enter your water amount and ratio, then round the dose only as much as your scale requires.

How many scoops of coffee per cup?

If you don’t have a scale yet, a coffee scoop gets you close. A standard coffee scoop holds about 2 level tablespoons, which is roughly 10 g of ground coffee. The exact weight depends on the grind and roast, since darker, coarser coffee is lighter per scoop. So treat scoops as a starting point, and switch to weighing once you find a cup you like.

Brew water	Coffee at 1:16	Coffee scoops (≈10 g)	Level tablespoons (≈5 g)
250 mL / 1 cup	15.6 g	About 1½	About 3
500 mL / 2 cups	31.3 g	About 3	About 6
1,000 mL / 4 cups	62.5 g	About 6	About 12
2,000 mL / 8 cups	125 g	About 12½	About 25

For a stronger cup, move toward 1:15 by adding about half a scoop per 250 mL. For a lighter cup, move toward 1:18 by using about 1 level scoop per 250 mL.

How much coffee for a drip coffee maker?

Coffee makers usually count a “cup” as about 125 mL, not a full mug. Check the water line on your machine, work out the total millilitres, then divide by your ratio. At 1:16:

Coffee maker setting	Water	Coffee at 1:16	Coffee scoops (≈10 g)
4 machine cups	500 mL	31 g	About 3
6 machine cups	750 mL	47 g	About 4½
10 machine cups	1,250 mL	78 g	About 8
12 machine cups	1,500 mL	94 g	About 9½

Use a medium grind for flat-bottom drip baskets and a slightly finer medium grind for cone filters. If the pot tastes weak even at 1:15, the grind is probably too coarse for your machine. Change the grind before adding more coffee. Fresh beans matter too, so store them airtight and brew within a few weeks of the roast date.

When the cup needs adjustment

Too strong or too weak: change the coffee dose while keeping water constant.
Sour, sharp, or underdeveloped: consider a finer grind, hotter water, or a longer contact time before changing ratio again.
Bitter, dry, or astringent: consider a coarser grind, cooler water, or shorter contact time.

Those diagnosis notes are starting points, not a substitute for tasting. Adjust the coffee-to-water ratio for beverage strength; adjust grind, temperature, and contact time for extraction.

Explore Caffeine Brothers for coffee beans, then write down the origin, roast date, ratio, dose, water, and result. A simple repeatable note makes it easier to reproduce a recipe you enjoy.

Sources checked September 17, 2026. Calculations use coffee-to-water ratios by mass. The SCA reference describes a standardized brewer-testing starting ratio; method recipes are practical starting points.