Which grain mill is the quietest?
KoMo's hand mill is the quietest grain mill on any maker's figures: KoMo lists it at "ca. 60 db" with spelt on the fine setting, 10 below every electric mill KoMo sells.
On that one KoMo row, the picks fall into three steps:
- Hand mill: ca. 60
- Fidibus 21, KoMoMio, Fidibus Classic: ca. 70
- Fidibus XL: ca. 72
The hand mill earns its place by being turned by hand. It mills about 50 g of wheat a minute, half the rate of the electric mills, so a kilo of flour takes about 20 minutes of cranking.
Which electric grain mill is the quietest?
Among electric grain mills, KoMo's 250 W and 360 W models share the lowest printed figure, ca. 70 db with spelt on fine, so the Fidibus 21, KoMoMio and Fidibus Classic tie.
KoMo prints the same 70 for the Fidibus Medium, Magic, PK 1, KoMoMio ECO and the Duett 100 mill and flaker. With eight models on one figure, noise cannot choose between them; hopper size, case and price can.
The Fidibus 21 is the compact one, with an 850 g hopper and 421 € for the US cord version. The KoMoMio holds 1200 g for 386 €. The Fidibus Classic swaps multiplex for solid beech at 640 €.
Is a hand grain mill quieter than an electric one?
On KoMo's figures, yes: its hand mill lists ca. 60 db for spelt on fine, against ca. 70 for its quietest electric mills on the same row.
A crank takes the motor out of the machine, though KoMo does not say where its 10 db gap comes from. What it does print is the cost in speed: about 50 g of wheat a minute by hand, against 100 g for a 250 W Fidibus 21.
KoMo also sells a 140 W drive that turns the hand mill by motor, listed at "ca. 62 db". That row names no grain or setting, so we quote it without placing it between the 60 and the 70.
Does a bigger motor make a grain mill louder?
Slightly, on KoMo's numbers: its 600 W Fidibus XL and XL Plus list ca. 72 db for spelt on fine, 2 above the ca. 70 of its 250 W and 360 W mills.
The XL mills about 200 g of wheat a minute, twice the rate of the smaller mills. A run of the same size therefore takes about half as long, and for many kitchens the shorter run will matter more than 2 db.
KoMo's 700 W Jumbo, sized for heavy users, also lists ca. 72 at about 350 g a minute.
How loud is a NutriMill grain mill?
NutriMill gives no decibel number for its grain mills; its pages describe noise in words for the Impact, Harvest and Classic.
The Impact page says the mill "runs noticeably quieter than older high-speed mill designs, reducing operating decibels", without saying by how much. The Harvest page calls its stone mill "whisper-quiet". The 2026 Classic adds a "Sound-dampening hopper lid", again with no figure.
So NutriMill's mills cannot be placed beside KoMo's 70. They are in the also considered list with their prices.
Do Mockmill and WonderMill print decibel ratings?
No. Mockmill's US manual and product pages print no noise figure for its Lino or Professional mills, and WonderMill's pages make a quiet claim without a number.
Mockmill's August 2019 manual for the Lino 100, Lino 200, Professional 100 and Professional 200 lists 360 W or 600 W, about 1500 rpm on 60 Hz, 90 mm stones and output, and stops there. Its manual for the Mockmill 100 and 200 has no figure either, nor do the Mockmill pages on its German store.
WonderMill's electric mill page says "The WonderMill is the quietest and fastest mills available." None of the 23 WonderMill pages we read gives a decibel figure behind that.
What does "ca. 70 db" mean on a KoMo mill?
It means about 70 decibels, which is what "ca." stands for in German, measured while the mill grinds spelt on its fine setting, by KoMo's own row label.
KoMo writes "db" with no A for weighting, and gives no distance from the mill, so the number cannot be set against a figure from another brand or another appliance. Our dBA explainer covers why the weighting and distance matter.
Because the grain and setting are fixed across KoMo's range, the gap between a 60, a 70 and a 72 is a fair comparison inside KoMo. KoMo gives no figure for coarse settings or for other grains.
