UltraRough

FEPA P-grade · Converted

P80 in CAMI grit and microns.

P80 paper averages about 201 µm on the FEPA table. On the US CAMI scale that is about CAMI 80. A sheet printed plain "80" is about 190 µm, close enough that the P barely matters at this grade.

Avg. particle
~201 µm
FEPA table
Nearest CAMI
80
by particle size
Plain "80"
~190 µm
CAMI 80 ≈ P80
3M Trizact
·
no A-grade paired by 3M

What P80 is for

The first real pass on raw wood; shaping body filler.

Either side of P80

The neighborhood.

P-gradeAvg. particleCAMI
P50336 µm50
P60269 µm60
P80201 µm80
P100162 µm80–100
P120125 µm120

At this grade

Paper we link at P80.

Questions people ask

What is P80 in CAMI grit?

About 80. P80 averages 201 microns on the FEPA table and CAMI 80 averages 190, so the scratch is close to the same.

How many microns is P80 sandpaper?

About 201 microns average particle diameter, per the FEPA P-grade table (ISO 6344).

Is P80 the same as 80 grit?

Close enough to treat as the same. P80 averages 201 microns and CAMI 80 (a bare "80" on US paper) averages 190.

Convert any other grade, from CAMI, microns or a Trizact A-number, on the grit converter.

Sizes are average particle diameters from the published FEPA (ISO 6344) and CAMI (ANSI B74.12/B74.18) tables. "Nearest" means within 10%; otherwise both neighbors are shown. Trizact pairings are 3M's own. Sources: Wikipedia, "Sandpaper" grit table (rev. 1127917881); Klingspor coated abrasives grit chart.