A coffee grinder runs for fifteen seconds and makes more noise in that time than anything else on the counter. If you grind before the rest of the house is up, a quieter grinder is worth money. The trouble is that almost nobody publishes a number.
We read the maker pages and manuals for home grinders sold in the US and found nine with a noise figure from the maker. They come from Mazzer, Fiorenzato, La Marzocco and Rancilio in Italy, Mahlkönig in Germany, Ascaso in Spain and Niche in the UK. The brands most people shop first print nothing we could rank.
Our picks are listed above, with full specifications for each.
The nine figures fall into three groups, and they cannot be ranked against each other.
The first is the EU daily exposure declaration. Mazzer and Fiorenzato write their manuals for European workplace rules, and declare the average level a worker would be exposed to if the grinder ran 240 minutes in an eight hour day. Mazzer's Philos declares 74 dB(A) ± 2.2. Fiorenzato's AllGround and AllGround Sense declare 78 dB(A). Same assumption, same kind of number, so the Philos is lowest here by four decibels.
The second is an A weighted figure with no distance. Mahlkönig's X54 manual gives a "Sound emission value (during grinding)" of 65 dB(A). La Marzocco's Pico manual says the "weighted sound pressure level of the machine is lower than 70dBA". The X54 is a single value and the Pico is a ceiling, and a ceiling is a promise not to exceed, not a measurement, so we do not line them up. Neither names a distance.
The third is a plain dB figure with no (A). Ascaso prints "Noise (dB)" as 60 for the H64. Niche lists "Noise: 72dB during grinding" for both the Zero and the Duo. Rancilio's current Stile manual says "≤ 70 dB", again a ceiling. Among the single values the H64 is lowest, twelve below the Niche pair.
No grinder here has a sound power figure, and none gives sound pressure at a stated distance. That is the kind of figure we would most like to rank, and this category does not have one.
Why 60 is not lower than 65
It is tempting to read the Ascaso's 60 dB as quieter than the Mahlkönig's 65 dB(A). The numbers do not support that.
A figure printed as "dB" may not be A weighted, and A weighting changes the result, usually downward for machines with a lot of low frequency hum. A figure with no distance could have been taken with the meter touching the housing or across the room, and the difference between those is easily more than five decibels. Neither maker says. The sound power vs sound pressure explainer covers why those details matter, and why you cannot compare dB ratings across brands covers the rest.
So the ranking is honest only inside each group. The Mahlkönig X54 has the lowest A weighted figure. The Ascaso H64 has the lowest plain dB figure. The Mazzer Philos has the lowest exposure declaration. Each is a real answer to a narrower question.
Mazzer and Fiorenzato: a worker's day, not a kitchen
The exposure figures read oddly in a home manual, and it helps to know why they are there. European law limits the noise a worker can be exposed to over a day, and makers of café equipment declare where their machine sits against that limit. Both Mazzer and Fiorenzato assume a heavy 240 minutes of grinding in eight hours, which no home grinder will ever see.
That makes the figure a comparison tool, not a prediction. Four hours of grinding a day is far beyond what a home grinder sees, so neither number tells you what you will hear at the counter. What the figures do tell you is that, on identical assumptions, Mazzer declares the Philos four decibels lower than Fiorenzato declares its AllGround pair.
Two details are worth knowing. Mazzer's English and Italian text call the Philos figure acoustic pressure, while its French text calls the same number sound power. Pressure is what an exposure level is built on, so we follow the English. And Fiorenzato's manuals name EN 60704-1 and a reverberation room for "the maximum sound emission", then print no value for it. The test that would give a proper sound power figure appears to have been done, and the result is not in the manual.
Fiorenzato's AllGround manual also lists only 220-240 V, while Fiorenzato USA sells the grinder for US mains and links that manual for it. We treat the figure as the maker's declaration for the model name, and say so in the listing.
Mahlkönig and La Marzocco: closer to a real spec
Mahlkönig's X54 manual is the most useful single document here. It gives "65 dB(A)" with the condition "during grinding", in one technical data table that covers the 110-120 V version Mahlkönig USA sells. It stops short of saying whether that is pressure or power, and at what distance.
La Marzocco's Pico manual goes further in one respect and less far in another. It is the only emission figure that names its quantity, "weighted sound pressure level", and it gives a ceiling of 70 dBA rather than a value. It gives no distance. A pressure figure without a distance is still half a figure, but it is the clearest description of what was measured anywhere in this guide.
Ascaso, Niche and Rancilio: plain numbers
Ascaso's H64 manual has "Noise (dB)" in its specification table, value 60, and AscasoUSA's page repeats it as "just 60 dB during grinding". Niche's tech specs say "Noise: 72dB during grinding" for both its grinders, the conical Zero and the 83 mm flat burr Duo. Stating the condition helps; the missing weighting and distance do not.
Rancilio is the only maker whose documents disagree with each other. Its 2022 manual for the original Stile printed "Noise [dB (A)] (with appliance in operation)" as 69. Its current manual, covering the Stile and the Stile SD, prints "Noise level during use" as "≤ 70 dB", dropping both the (A) and the single value. We rank on the current document, which puts the Stile SD in the plain dB ceiling group by itself.
Price and what you get
The grinders with figures are not cheap. The Mahlkönig X54 at $599 and the Rancilio Stile SD at $620 are the least expensive with USD prices. The Mazzer Philos at $1,495 is the most expensive, and Mazzer itself calls it a light commercial grinder. The Fiorenzato pair sit at $1,225 and $1,395, with the extra buying a built in scale. Niche shows only pound sterling prices on its own store, so we list none.
If you want a grinder under $300 with a published figure, we could not find one. That says less about cheap grinders being loud than about budget brands printing no figures.
The silent aisle
The grinders most people search for first publish nothing we could rank.
Breville's US instruction book for the Smart Grinder Pro, BCG820, has no noise figure. Fellow's Ode Brew Grinder Gen 2 page promises "Quiet grind noise" and says Ode is "Engineered to reduce grind noise", with no number, and its Opus 2 page prints none either. Eureka built its Silent range around "Silent Technology", and its Silenzio 55 leaflet says the anti vibration solution "reduces the grinding noise by approximately 20 dB compared to the conventional grinders". A reduction from an unnamed baseline cannot be ranked, and Eureka's user manual gives no absolute figure. OXO's conical burr grinder instructions carry no figure. Timemore's Sculptor series page shows none.
Lelit's William PL72 page links only a one page quick guide with no figure. We found a fuller Lelit manual with a figure, but only on retailer and distributor sites, which do not count here. Ceado's E37 manual says "the appliance does not exceed 70 dB", but the E37 series is a café grinder, so we left it out of a home guide. We could not read usable product text on Baratza's or De'Longhi's US pages, or on KitchenAid's, so we make no claim either way for those brands.
These grinders may be quiet. Their makers do not say how quiet in a form we can compare.
Treat each figure as the maker's claim for one situation: beans in, burrs turning, nobody saying where the meter was. Within a group, a gap of a few decibels is worth noticing, especially with Mazzer's stated tolerance of 2.2. Across groups, ignore the digits. And remember that what bothers people most about a grinder is often not the level but the pitch, a high whine from a fast small burr set versus a lower rumble from a slower large one, and no single number describes that.
We did not measure any of these grinders. Every figure here is the maker's own, quoted as published from the maker's page or manual, with the weighting, condition and standard given wherever the maker gave them.
