Coffee Grind Size Chart
Grind size controls how fast water pulls flavour out of coffee. It is not a strength dial — that is the ratio. It is a speed dial, and it decides whether extraction finishes early and tastes sour or runs long and turns bitter. Same beans, same dose, two entirely different drinks.
It is also the variable most people adjust last, after they have already blamed the beans, the machine and the water. Adjust it first. The chart below maps each common brew method to a grind size, a household comparison you can check by eye, and the contact time it is aiming for.
Coffee grind size chart
| Grind size | Looks and feels like | Brew methods | Approx. brew time |
|---|---|---|---|
| Extra Coarse | Peppercorns; rough, chunky sea salt | Cold brew, cowboy coffee | 12–24 hours |
| Coarse | Coarse sea salt | French press, percolator | About 4 minutes |
| Medium-Coarse | Coarse sand | Chemex, Clever dripper | 4–6 minutes |
| Medium | Granulated sugar; smooth sand | Drip / auto maker, flat-bottom basket | 4–6 minutes |
| Medium-Fine | Table salt | Pour-over cone (V60), AeroPress | 2–3 minutes |
| Fine | Powdered sugar with a little grit left in it | Espresso, moka pot | 25–30 seconds for espresso; a moka pot runs longer on the hob |
| Extra Fine | Flour; true powdered sugar | Turkish (ibrik) | 3–4 minutes, brought up to a boil |
Every grinder's numbers belong to that grinder alone. Two machines set to “15” will not hand you the same particle size, so trust the household comparison rather than the dial marking. Move one step at a time, and taste before you move again.
Troubleshooting: what the cup is telling you
| Symptom | Likely cause | Fix |
|---|---|---|
| Sour, thin, weak | Under-extracted — water finished before it pulled enough out of the grounds | Grind one step finer |
| Bitter, harsh, drying | Over-extracted — water kept pulling past the good part | Grind one step coarser |
| Muddy or silty cup | Grind too fine for the filter; fines are slipping straight through | Grind coarser. With a press, let it settle and leave the last inch |
| Slow drawdown, brewer floods | Grind too fine — the bed has compacted and clogged | Grind coarser |
| Fast drawdown, pale watery cup | Grind too coarse — the water met no resistance | Grind finer |
| Espresso gushes and runs blonde | Grind far too coarse for the basket | Grind finer in small increments |
Change one thing at a time or you will never learn which change worked. Once the grind is behaving, the two levers underneath it are dose and heat: run the numbers in the coffee-to-water ratio calculator, then check your water temperature.
Burr vs blade grinders
A burr grinder crushes beans between two abrasive surfaces held a set distance apart. Everything that passes through comes out at roughly the same size, so everything extracts at roughly the same rate. That uniformity is the entire point.
A blade grinder chops. A spinning blade strikes whatever happens to be in its path, which produces dust and boulders in the same batch. The dust over-extracts and goes bitter while the boulders under-extract and stay sour — in one cup, at the same moment, and no adjustment to ratio or temperature can pull them apart. If you buy a single piece of coffee equipment, buy a burr grinder.
Grind fresh, or don't bother
A whole bean is largely sealed. Grinding it multiplies the surface area exposed to oxygen many times over, and the aromatic compounds that make coffee smell like coffee begin leaving immediately. Whole beans hold their character for weeks. Ground coffee is measured in days.
That is why we roast to order instead of roasting into a warehouse, and why every bag ships whole bean or ground — your choice at checkout. The terms are in our freshness promise. If you own a grinder, buy whole bean and grind per brew; it remains the cheapest upgrade available to a home cup.
Common questions
What grind size for a drip coffee maker?
Medium — about the texture of granulated sugar. Flat-bottom baskets, which most auto makers use, like a hair coarser than a cone-shaped basket does. If the machine overflows or the brew crawls, you have gone too fine.
Can I use pre-ground coffee for espresso?
Only if it is sold as espresso grind, and even then it is a compromise. Standard pre-ground coffee is cut for drip and is far too coarse for a pressurised basket: the shot gushes through in seconds and lands sour and watery. Espresso is the least forgiving method there is, which makes it the one that most rewards grinding to order.
How do I know if my grind is too fine?
The brewer tells you before the cup does. Water pools on top of the bed, drawdown stalls or the basket overflows, and the coffee arrives bitter and drying with silt in the bottom of the mug. Go one step coarser and brew again.
Does grind size change caffeine?
Not in any way worth planning around. The caffeine is in the bean, and grinding does not add or remove any of it. A finer grind extracts faster, so it can pull marginally more of what is already there in a given contact time, but how much coffee you weigh out and which method you brew with matter far more than where the grinder is set.
Burr or blade?
Burr. A blade grinder produces dust and boulders at once, and the resulting cup is over-extracted and under-extracted simultaneously — a problem no recipe can correct. A modest burr grinder outperforms an expensive brewer fed by a blade.
Should I grind for the whole week?
No. Grind per brew if you possibly can, because that is where most of the aroma is lost. If your mornings do not allow it, grind a day or two ahead at most and keep it airtight, away from light and heat — and never store it in the freezer door.