Sandpaper Grit Chart


This chart compares sandpaper grits using three different grading systems: 1) Coated Abrasives manufacturer’s Institute (CAMI), 2) Federation of European Producers Association (FEPA), and 3) the “0” or “ought” grade system. CAMI and FEPA are the two most common grading systems in use today. CAMI is used primarily in North America whereas FEPA is used in Europe and many other parts of the world. The “ought” system is an older grading system that is seldom used anymore but included here for sentimental reasons.

Sandpaper is labeled on the back with the grit size. If there is a “P” in front of the grit number (ex: P180), the grading system is FEPA. If there is no P prefix, it is CAMI. (There are other standards such as JIS but it is rarely used outside of Japan).

CAMI
Grade
FEPA
Grade
“0” Grade
P12
P16
16 4
P20
20
P24
24 3
30
P30
36 2
P36
40
P40
50 1
P50
60 ½
P60
P80
80 0
P100
100 2/0
P120
120 3/0
P150
150 4/0
180 5/0
P180
220 6/0
P220
P240
240 7/0
P280
P320
280 8/0
320 9/0
P400
P500
360
P600
400 10/0
P800
500
P1000
600
P1200
P1500
800
P2000
1000
P2500
1200
1500
2000

Note

The CAMI and FEPA scratch patterns are similar for the coarser grits up to 220 grit or so.  Above this, FEPA graded sandpaper becomes increasingly coarser than CAMI graded paper for a given grit size. In addition, CAMI is less stringent than FEPA in that it tolerates a wider range of particle sizes for a given grit grade. This is not a big deal for coarser grits because a finished surface is not the goal and hence CAMI is still used for grades coarser than 80 grit by most major abrasive manufacturers. On the other hand, because FEPA does have a tighter tolerance for particle size (= more consistent scratch pattern), some woodworkers prefer FEPA graded paper for fine finish sanding tasks.

 

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