Micrometers to FEPA P-grade
Type a value in µm to get it in grit instantly.
P74grit
That's 1.09× as coarse as P80 paper for shaping wood, while P40 paper for stripping paint is 1.93× coarser.
Convert the other way: grit to µm
What it means
How coarse is that grit?
Average particle sizes from FEPA (ISO 6344), ANSI B74.12/B74.18 and JIS R6001. Brands and bonds vary; treat values between listed grits as estimates.
The math
How to convert µm to grit
Grit scales are tables: P220 = 68 µm = CAMI 220, but P1000 = 18.3 µm ≈ CAMI 600. Between listed grits the size is interpolated.
Example: 220 µm = P74 grit.
Every unit
That grit in every standard
Tables
µm to grit conversion table
| µm | grit |
|---|---|
| 10.3 µm | P2000 grit |
| 12.6 µm | P1500 grit |
| 18.3 µm | P1000 grit |
| 21.8 µm | P800 grit |
| 25.8 µm | P600 grit |
| 35 µm | P400 grit |
| 46.2 µm | P320 grit |
| 58.5 µm | P240 grit |
| 68 µm | P220 grit |
| 82 µm | P180 grit |
| 100 µm | P150 grit |
| 125 µm | P120 grit |
| 162 µm | P100 grit |
| 201 µm | P80 grit |
| 269 µm | P60 grit |
| 425 µm | P40 grit |
grit to µm conversion table
| grit | µm |
|---|---|
| P40 grit | 425 µm |
| P60 grit | 269 µm |
| P80 grit | 201 µm |
| P100 grit | 162 µm |
| P120 grit | 125 µm |
| P150 grit | 100 µm |
| P180 grit | 82 µm |
| P220 grit | 68 µm |
| P240 grit | 58.5 µm |
| P320 grit | 46.2 µm |
| P400 grit | 35 µm |
| P600 grit | 25.8 µm |
| P800 grit | 21.8 µm |
| P1000 grit | 18.3 µm |
| P1500 grit | 12.6 µm |
| P2000 grit | 10.3 µm |
Quick answers
Quick answers
- How many grit is 10 µm?
- 10 µm is P2079 grit.
- How many grit is 220 µm?
- 220 µm is P74 grit.
The units
About these units
Micrometers (µm)
The average particle size.
FEPA P-grade (grit)
The European grade printed with a P: P120, P400.
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