How Many Ounces in a Cup of Ground Coffee?

1 cup is 2.89 ounces of ground coffee. Below is the full chart, with a section of its own for each amount worth having to hand.

Cups to ounces: full chart

Where this conversion shows up in practice

1 cup is 2.89 ounces of ground coffee. 1 of these makes 2.89, counting from the 1 cup figure of 2.89 ounces. Read in reverse, 2.89 ounces comes back to 1 cup. 2 cups is 5.78 ounces of ground coffee.

2 of these makes 5.78, counting from the 1 cup figure of 2.89 ounces. Read in reverse, 5.78 ounces comes back to 2 cups. Set the measure to 5.78 ounces and you have 2 cups without doing the sum twice. 3 cups is 8.68 ounces of ground coffee.

That is 2.89 multiplied by 3, since 1 cup is 2.89 ounces of ground coffee. Read in reverse, 8.68 ounces comes back to 3 cups. A recipe asking for 3 cups wants 8.68 ounces in the measure, not an estimate of it. 4 cups is 11.6 ounces of ground coffee.

Half this amount, 2 cups, comes to 5.78; double it and you are at 23.1. Read in reverse, 11.6 ounces comes back to 4 cups. Written into a method, 4 cups reads as 11.6 ounces and nothing else has to change. 6 cups is 17.4 ounces of ground coffee.

Take the 1 cup figure of 2.89 ounces and multiply by 6 to get there. A quarter of it comes to 4.34 ounces and three quarters to 13 ounces. Scaling a recipe from 6 cups starts at this row rather than at the headline figure.

8 cups is 23.1 ounces of ground coffee. Half this amount, 4 cups, comes to 11.6; double it and you are at 46.3. Add the same again and you are at 46.3 ounces; take one away and you are back to 20.2 ounces.

A recipe asking for 8 cups wants 23.1 ounces in the measure, not an estimate of it. 12 cups is 34.7 ounces of ground coffee. Half this amount, 6 cups, comes to 17.4; double it and you are at 69.4. Read in reverse, 34.7 ounces comes back to 12 cups.

16 cups is 46.3 ounces of ground coffee. 16 of these makes 46.3, counting from the 1 cup figure of 2.89 ounces. Read in reverse, 46.3 ounces comes back to 16 cups. Anyone halving the batch needs 8 cups, which is 23.1 ounces.

The quick version

To go from cups to ounces, multiply by about 2.89. One cup is 2.89 ounces. The arithmetic does not change with the amount you start from. Going back the other way, one ounce returns 0.346 cup.

No weighing is involved, so there is nothing to get wrong at the scale.

Worked through, start to finish

Say a batch you are making for a crowd asks for 6 cups, and your equipment is only marked in ounces. Take the one-cup figure of 2.89 ounces and apply it 6 times: 17.4 ounces. That is the number you want on the jug.

Swap the coffee for something else and the figure moves.

Why this one depends on the ingredient

Two cups of equal size can differ in weight by half again, because a cup measures space. ground coffee comes in at 82 g a cup against 237 g for water — 65 per cent lighter — and the chart is that figure scaled.

Put the other way round, a pound of ground coffee fills 5.53 cups, and 5.13 g of it comes to a level tablespoon. Neither number transfers to a different ingredient.

Weight per cup for common ingredients

Across those rows ground coffee is the lightest at 82 g to the cup and honey the heaviest at 340 g, a spread of 4.15 times. That spread is the whole reason a cup figure means nothing until the ingredient is named.

Every figure above is one level cup, spooned in and swept flat. Scooping straight from the bag packs the cup and can add a fifth again to the weight, which is why bakers who want the same result twice weigh instead of measuring.

What moves this number

How long the bag has been open. Anything that draws moisture from the air gains weight sitting on the shelf, and gains it unevenly.

Anything that changes how the ingredient sits in the measure changes the answer with it.

Going the other way: ounces to cups

One ounce comes back to 0.346 cup, so the two directions are reciprocals of each other: multiply by 2.89 going out and divide by it coming back.

Half of one ounce is 0.173 cup, and a quarter is 0.086 cup.

Measuring it properly

The packing problem is why two cooks measuring “one cup” of the same ingredient can be twenty per cent apart. A scale sidesteps it.

The same cup of the same ingredient can vary by a fifth depending only on how it got into the cup. Nothing about the ingredient changed; only the air trapped in it did.

Set the bowl on a scale, press tare, and add ground coffee until the display reads the figure you want. That removes the guesswork entirely.

Spoon it into the cup rather than dragging the cup through the bag. The dragging motion compresses whatever is underneath and the cup comes out heavy every time.

When you can round and when you cannot

Where a recipe gives an odd figure it usually got there by conversion rather than by choice. Rounding it back to the round number it started as is often closer to the intent than the decimal.

Rounding a weight is safe for anything you are seasoning to taste and risky for anything that has to set.

Round the same way every time you make the dish. Consistency beats accuracy here, because a result you can repeat is a result you can adjust next time.

The error people make most often

Packing the cup without meaning to. Dipping the cup into the bag is the natural motion and the one that adds the most weight; spooning in and levelling is the measure every recipe assumes.

Assuming every ingredient behaves like water. Water is the one case where a fluid ounce and an ounce nearly coincide, which is exactly why the habit forms and exactly why it breaks on flour, oil and honey.

Borrowing a figure quoted for a different ingredient. Cup weights are published everywhere and rarely labelled clearly, and one lifted from the wrong row can be half again out.

Reading a weight instruction as a volume one. A recipe asking for 8 ounces of flour means 8 ounces on a scale, not one cup. Read as a cup, it puts almost double the flour in the bowl and the dough never comes right.

Where this comes up

This comes up whenever a recipe crosses a border. 1 cup is 2.89 ounces, and once that is fixed the rest of the recipe scales from it.

Nutrition labels are written in one system and recipes in another. 1 cup is 2.89 ounces is what lets you read the packet and the method as the same language.

Scaling a recipe up for a crowd is the other place it appears. 1 cup is 2.89 ounces, and every other quantity follows from getting that one right.

Shopping is where this bites first. Packets are labelled in one unit and the recipe calls for another, and 1 cup is 2.89 ounces is the sum standing between the two.

Spoon and part-cup weights

Below roughly 3 g a spoon beats a scale, because that is the point where a domestic scale starts guessing at the last digit.

Half, double and triple

Half of 1 cup is 1.45 ounces of ground coffee. Double it and you have 5.78 ounces; triple it and you are at 8.68 ounces. A batch cut to a quarter needs 0.723 ounce.

Multiply or divide the whole line at once rather than converting each step; the answer is the same and there is less to get wrong.

One and a half batches come to 4.34 ounces, six times to 17.4 ounces and a dozen to 34.7 ounces. Cut to a third it is 0.964 ounce.

The exact figure and the one worth using

The exact figure for 1 cup is 2.89. Written the way most cooks would write it, 3 ounces, it is out by 0.108 — about 3.7 per cent. On one batch that is invisible.

Scaled four times the gap is 0.43, which is where it starts to show in anything that has to set.

Cup to Ounce Coffee Basics

Use the chart for ground coffee only. A cup of beans, instant coffee, or brewed coffee will not match it. The grind, roast, and packing change the weight in the cup, so treat the cup as a kitchen measure, not a scoop.

For the listed ground coffee conversion, each cup tracks to 2.89 ounces. Use that value when scaling a recipe, filling a storage container, or checking whether a bag has enough coffee for a planned batch.

Spoon the coffee into the cup, then level it with a straight edge. Do not shake, tap, or press the grounds down. Packed coffee gives more weight than the chart expects, which can make the brew stronger and waste coffee.

A digital scale is the cleaner method. Put the empty bowl or filter holder on the scale, tare it, then add ground coffee until the ounce reading matches the chart. This avoids guessing from a fluffy or uneven cup.

If you only have ounces and need cups, use the reverse figure, 0.346 cups per ounce. This helps when a recipe gives coffee by weight but your container, scoop, or measuring cup is marked by volume.

Expect small differences between coffees. Fine grounds settle more tightly than coarse grounds. Dark roasts can feel lighter by volume than some lighter roasts.

The chart gives a practical working value, not a promise that every grind will sit the same way.

The common mistake is treating coffee like water. A cup of ground coffee does not weigh like a cup of liquid. Volume measures space; ounces here measure weight. That is why dry ingredients need their own conversions.

Do not use a fluid ounce mark on a liquid measuring jug as an ounce of coffee by weight. Fluid ounces measure volume. Ounces in this chart measure mass. The shared name causes bad coffee and wrong recipe scaling.

If your recipe is sensitive, weigh the coffee. Ground coffee is listed at 82 g per cup, which is useful if your scale switches between grams and ounces. Keep the unit consistent through the whole recipe.

For everyday brewing, measure the same way each time. Use the same cup, the same levelling method, and the same grind setting. Consistency matters more than chasing a perfect-looking cup, because repeatable measuring gives repeatable coffee.

Ground Coffee Density Matters

Ground coffee is not a fixed solid. A cup measures volume, while an ounce measures weight. The chart works because it assumes a typical packed volume for ground coffee, but your scoop can still vary.

The grind changes how much coffee fits in the cup. Fine grounds settle tightly, so the same cup can weigh more. Coarse grounds leave more air between particles, so the same cup can weigh less.

How you fill the cup matters too. Scooping from a bag compresses the coffee. Spoon-filling keeps it looser. Shaking or tapping the cup settles the grounds and changes the weight again.

This is why a measuring cup is convenient but not exact. It is good for quick kitchen work, batch estimates, and checking whether you have enough coffee. It is weaker when a recipe depends on repeatable strength.

For brewing, the practical action is simple: use the chart for a starting point, then weigh the coffee if flavour matters. Weight removes the guesswork caused by grind size, settling, and packing.

If the brewed coffee tastes thin, the cup measure may have held less coffee than expected. If it tastes harsh or heavy, the cup may have held more. Do not blame the water first; check the measuring method.

Use the same routine each time. Fill the cup the same way, avoid pressing the grounds down, and level the top gently. Consistency matters more than chasing a perfect-looking scoop.

Ground coffee also changes during storage. A bag that has been opened, shaken, and partly emptied may settle differently from a fresh bag. Clumps and compacted corners can make a scoop heavier than expected.

If you are converting for shopping, the chart is usually enough. If you are converting for a brew recipe, a scale is better. The cup tells you volume; the scale tells you the coffee dose.

A useful reference point is that ground coffee is listed at 82 g per cup. Treat that as a density assumption, not a promise that every scoop from every bag will match it.

Use ounces for buying and scaling. Use cups only when speed matters more than precision. That keeps the conversion useful without pretending ground coffee behaves like water.

Measuring Ground Coffee by Weight

Use a kitchen scale for ground coffee when the brew needs to taste the same each time. Scoops vary with grind, roast, settling, and how firmly the coffee is packed. Weight removes that guesswork before water ever touches the grounds.

Place an empty bowl, filter basket, or brewing container on the scale. Tare the scale so the display returns to zero. Add ground coffee slowly until the target weight is reached.

Stop adding, then level or distribute the grounds as your brewer requires.

If your recipe is written in cups, use the chart to find the matching ounce weight, then weigh that amount. Do not press coffee into the cup to make it fit. Pressing changes the amount in the cup and makes the chart less useful.

Ground coffee is light for its volume. The reference cup weight here is 82 g, so a full-looking cup is not a heavy ingredient compared with sugar, honey, or salt. That is why small handling differences show up in the finished brew.

Use the same grind style each time you measure. Fine grounds settle more tightly than coarse grounds. A scoop of fine coffee can hold more coffee than the same scoop filled with coarse coffee, even before anyone tampers or shakes it.

Pour the grounds gently rather than tapping the container on the counter. Tapping settles the coffee and lets more fit into the same space. That can make a cup measure look correct while the brew tastes stronger than expected.

If you grind beans at home, weigh after grinding for the most direct result. Grounds can cling inside the grinder, and some fines may stay behind. Weighing the finished grounds tells you what actually goes into the brewer.

If the scale shows ounces, use the ounce amount from the chart. If it shows grams, convert only if your recipe or scale requires it. The supplied ounce-to-gram reference uses 28.3495 g for 1 ounce, so keep the same reference throughout.

Do not mix volume and weight corrections in the same batch. If you start by weighing, finish by weighing. Adding “one more spoon” by sight changes the ratio and makes it harder to repeat a good result later.

Record the weight that tastes best with your brewer, grind, and coffee. Use that weight again, not the scoop count. The next bag may still need adjustment, but the scale gives you a reliable starting point.

Scooped Versus Leveled Coffee Cups

A scooped cup and a levelled cup can hold noticeably different amounts of ground coffee. The difference comes from how the grounds settle, mound, and compact as they move from the bag or grinder into the measuring cup.

Scooping straight from a bag usually packs coffee into the cup. The rim drags through the grounds, pressure builds, and fine particles fill gaps. The result is a heavier cup than one filled gently with a spoon.

Levelling changes the amount again. If you sweep firmly across the rim, you may press the grounds down before removing the excess. If you skim lightly, you remove only the mound. Both look level, but they are not equal.

Use the same method every time if you measure by cups. Spoon the coffee into the cup, avoid shaking it down, then level with a straight edge. This gives a repeatable kitchen measure, even though it is still less exact than weighing.

Do not tap the cup on the counter unless your recipe tells you to. Tapping settles the grounds and creates room for more coffee. That makes the brew stronger and can throw off baking recipes that use coffee as a dry ingredient.

Grind size matters during scooping. Fine ground coffee settles tightly and can compact under light pressure. Coarser ground coffee leaves more air space. The same scoop motion can therefore give different weights from different grinds.

Freshly ground coffee can also behave differently from coffee that has sat in a tin. Fresh grounds may be fluffy and uneven. Stored grounds may settle during handling. Stir the container before measuring if the coffee looks compacted or layered.

For brewed coffee, a small measuring difference changes flavour. Too much ground coffee can taste bitter, harsh, or muddy. Too little can taste thin. If the cup measure is inconsistent, the brew changes even when the water amount stays the same.

For recipes, inconsistency affects texture as well as flavour. Coffee grounds can add dryness, grit, and bitterness. A packed cup may make a cake or rub stronger than intended, while a loose cup may barely show up.

If the chart gives cup-to-ounce amounts, treat them as level, handled measures, not packed scoops. For tighter control, weigh the coffee. Ground coffee is listed at 82 g per cup, so weight gives the cleaner check.

If you only have a cup measure, choose one routine and write it on the recipe. “Spooned and levelled” tells the next cook what to do. “Scooped” gives a different result and should not be assumed.

Brewing With Converted Coffee Amounts

Use the converted coffee weight as the batch amount, then brew by taste rather than by scoop memory. Put the brewer’s basket, filter, or dosing cup on the scale, tare it, and add ground coffee until the target weight is reached.

This avoids the main problem with cups: ground coffee settles, mounds, and traps air. A scoop from a fresh bag can weigh less than the same scoop from a compressed canister, even before grind size changes the fill.

For drip coffee, spread the grounds evenly in the filter after weighing. A sloped bed sends water through the low side first, giving weak patches and bitter patches in the same pot. Level the bed without pressing it down.

For pour-over, the converted amount helps you repeat a brew that worked. Keep the coffee weight fixed while changing grind, pouring speed, or water amount. Changing everything at once makes the result hard to diagnose.

For French press, weigh the grounds before they go into the carafe. Loose spoonfuls can vary a lot, and press coffee magnifies that variation because the grounds sit in the water for the full brew.

If the cup-based amount tastes thin after conversion, do not add random extra scoops. Grind a little finer, extend contact time, or use less water next time. Thin coffee often comes from fast flow, not only too little coffee.

If the brew tastes harsh, muddy, or drying, do not blame the chart first. Check for overfilled baskets, compacted grounds, too fine a grind, or water that sits too long with the coffee.

A converted amount can overflow a small filter if the original cup measure was generous. Leave headroom for bloom, foam, and stirring. If the bed rises into the shower head, use a smaller batch or a larger brewer.

For a partial batch such as 0.5 cups, weigh to 1.45 ounces and keep the same brewing method. Smaller brews often drain differently, so watch flavour and flow rather than expecting the brewer to behave identically.

Store the converted target with the brewing note: grind setting, brewer, filter type, and final taste. That gives the next brew a useful starting point instead of another guess from the scoop drawer.

Other ways this gets asked

These are the other phrasings that lead here, and the chart handles them all:

For every kitchen figure in one place, see the full conversion chart.

Sources

• NIST Handbook 44, Appendix C: General Tables of Units of Measurement
• King Arthur Baking, Ingredient Weight Chart

Measuring something else? Cups to Fluid Ounces: Every Common Amount covers this conversion for every common ingredient.

Related conversions

• Ounces to Cups Chart of Confectioners Sugar
• Convert Cups to Ounces of All-purpose Flour
• Cups to Fluid Ounces: Every Common Amount
• Ounces in a Cup of Butter: The Full Chart