How Much Coffee per Cup? Ratios, Grams and Tablespoons

This lesson gives you one ratio to start with, then translates it into grams and tablespoons for a single mug, a full 12-cup pot and every common brewing method. It also explains why the numbers on your coffee maker's carafe don't match your mug.

A kitchen scale makes all of this easier, but you don't need one. Every chart below includes a tablespoon column.

How much coffee should you use per cup?

For an 8-ounce mug, use about 15 grams of coffee, or about 4 level tablespoons of ground coffee. That is a 1:16 ratio by weight. For a 6-ounce cup, use about 11 grams, close to 3 level tablespoons. Go up a little for stronger coffee and down for lighter coffee.

Tablespoon figures assume about 4 grams per level tablespoon of ground medium roast, as measured by Trade Coffee. One gram of water equals one milliliter.

These amounts are for drip, pour-over and French press. Cold brew concentrate and espresso use far more coffee per ounce, as the method table further down shows.

What is the best coffee-to-water ratio?

Most good drip and pour-over coffee falls between 1:15 and 1:18, meaning 1 gram of coffee for every 15 to 18 grams of water. The Specialty Coffee Association's home brewer standard uses 55 grams of coffee per liter (1 kilogram) of water, about 1:18. A 1:16 ratio is a sensible middle starting point.

The National Coffee Association calls 1 to 2 tablespoons of ground coffee per 6 ounces of water the "Golden Ratio". That rule is easy to remember, but it covers a wide range. With level tablespoons of ground medium roast at about 4 grams each, 1 tablespoon per 6 ounces is near 1:44 and 2 tablespoons is near 1:22. For a fuller cup near 1:15, use about 3 level tablespoons.

The SCA standard also gives a target strength for brewed coffee of 1.15% to 1.55% total dissolved solids. You don't need a refractometer to use that. It simply means good coffee is about 98.5% water, and small changes in the amount of coffee change the strength you taste.

How big is a "cup" on a coffee maker?

A "cup" on most drip coffee makers is smaller than a standard 8-ounce measuring cup. De'Longhi, for example, states that its drip machines count 5 fluid ounces per cup. That means a 12-cup coffee maker brews about 60 ounces, enough for roughly seven 8-ounce mugs.

The numbers on the carafe are usually what trip people up. If you measure coffee for ten 8-ounce mugs but fill the reservoir to the 10-cup line, you'll use too much coffee for the water, since that line marks about 50 ounces. Check your machine's manual for its cup size, since brands differ.

The National Coffee Association's tablespoon rule uses 6 ounces of water as its unit, which is closer to a coffee maker cup than to a big mug. When a recipe says "per cup", look for the ounces or grams behind it.

How much coffee for 4, 8, 10 or 12 cups?

For a coffee maker that counts 5 ounces per cup, use about 37 grams of coffee for 4 cups, 74 grams for 8 cups, 92 grams for 10 cups and 111 grams for 12 cups at a 1:16 ratio. For a slightly lighter pot at the SCA ratio, use about 98 grams for 12 cups.

Water weights are rounded. Tablespoons assume about 4 grams per level tablespoon of ground medium roast.

How much coffee for a 12-cup coffee maker?

Use about 100 to 110 grams of coffee for a full 12-cup pot, or about 28 level tablespoons. Since a measuring cup holds 16 tablespoons, that is about 1¾ measuring cups of ground coffee.

For a big pot that stays on a warming plate, a blend built for drip helps. Peace Coffee Birchwood Breakfast Blend is a medium roast from Peru and Honduras with roaster notes of bittersweet chocolate, honey and cedar. Joe Coffee Company The Daily, a Rainforest Alliance Certified South American coffee, is described by the roaster as bright, sweet and balanced.

Does the ratio change by brewing method?

Yes. Drip, pour-over and French press sit close together, between about 1:13 and 1:18. Cold brew concentrate uses much more coffee, about 1:4 to 1:5, because you dilute it later. Espresso is the most concentrated of all, at about 1 gram of coffee to 2 grams of liquid espresso.

Ranges from the National Coffee Association's brewing guides and SCA Standard 310-2021.

Within each range, lighter roasts often taste better toward the stronger end and darker roasts toward the lighter end. Our beginner brewing lesson walks through each method step by step.

Why weigh coffee instead of using tablespoons?

A tablespoon measures volume, and coffee changes weight with roast and grind. Trade Coffee found a level tablespoon of ground medium roast weighs about 4 grams, while ground dark roast weighs only about 3 to 3.3 grams. Weighing removes that variation, so the same recipe tastes the same every time.

The difference adds up. If you switch from a medium roast to a very dark one and keep the same spoon count, you could be using around 20% less coffee by weight. That is enough to turn a balanced cup thin. Our lesson on whether dark roast has more caffeine explains the same effect from the caffeine side.

Whole beans vary too. Trade measured about 5 grams per tablespoon for medium roast beans, a little more for light roasts and under 4 grams for very dark roasts. A dense light roast like Coffee Bros. Light Roast, with roaster notes of honey, citrus and florals, packs more coffee into each spoon than a dark roast like Koffee Kult Thunder Bolt French Roast.

A basic digital kitchen scale that reads in 1-gram steps is enough. Put your filter or brewer on it, press tare, and add coffee until you hit the number.

How do you adjust the ratio to taste?

Change the amount of coffee when strength is the problem and the grind when flavor is the problem. If the cup tastes watery but pleasant, add coffee. If it tastes heavy, add water. If it tastes sour or bitter, adjust grind size or brew time first, since the ratio mainly controls strength.

• Too weak: move from 1:16 to 1:15. For an 8-ounce mug, that is about 1 extra gram.
• Too strong: move from 1:16 to 1:17, or add hot water to the finished cup.
• Sour and thin: grind finer or brew a little longer before you change the ratio.
• Bitter and dry: grind coarser or shorten the brew.
• Keep notes. Change one thing per brew so you know what helped.

Once you find a ratio you like, it carries over to new bags. Try it with a medium roast like Black & White Coffee Roasters The Original, an Ethiopian washed coffee the roaster says tastes of citrus, honey and chocolate, then adjust for lighter or darker roasts from there.

Frequently asked questions