What micron size is 1000 grit sandpaper?

A common FEPA P1000 abrasive is about 18.3 microns. CAMI 1000 grit is often listed around 9 microns, so check whether the paper uses FEPA P-grit or CAMI grit.

Is P grit the same as regular grit?

No. FEPA P-grit and CAMI grit use different grading systems. They are close in the coarse range but can differ a lot in fine sanding and polishing grits.

Does a higher grit number mean smaller microns?

Yes. Higher abrasive grit numbers generally mean smaller abrasive particles and a finer scratch pattern. The exact micron value depends on the grit standard.

Abrasive size converter

Sandpaper Grit to Micron Converter

Convert sandpaper and abrasive grit sizes to approximate microns, millimeters, and nearby grit grades. Compare FEPA P-grit and CAMI grit for sanding, sharpening, finishing, and polishing notes.

Convert grit or microns

Choose a grit standard, pick a grade, or enter microns to find the nearest abrasive grits.

Conversion mode Abrasive standard Grit size

Main result P1000 ≈ 18.3 microns

Fine wet-sanding and polishing range.

Millimeters 0.0183 mm

Approx. inches 0.00072 in

FEPA P1000 is commonly listed around 18.3 microns.

Nearest abrasive grades

For 18.3 microns, the closest listed FEPA grade is P1000.

FEPA P-grit vs CAMI grit

Many modern sandpapers use FEPA P-grit labels such as P80, P220, or P1000. Some North American abrasive charts use CAMI grit labels such as 80, 220, or 1000. The numbers look similar, but the particle-size ranges are not identical.

The coarse grades are usually close enough for rough comparison. Fine grades can diverge more, so a P1000 sheet and a CAMI 1000 sheet may not leave the same finish.

How to use the micron result

Use lower grit numbers and larger microns for shaping, stripping, and fast stock removal.
Use higher grit numbers and smaller microns for smoothing, finish prep, polishing, and sharpening.
When a finish schedule matters, follow the abrasive maker's own chart and test on scrap first.

Sandpaper grit to micron chart

Values are practical approximations compiled for quick comparison. Abrasive products can vary by manufacturer, backing, mineral type, coating, and grading standard.

Standard	Grit	Microns	Millimeters	Typical use

Sandpaper grit to micron FAQ

What grit is closest to 15 microns?

In this chart, 15 microns is closest to FEPA P1200 at about 15.3 microns. It is also near the fine polishing range.

What micron size is P220 sandpaper?

FEPA P220 is commonly listed around 68 microns, or 0.068 mm. CAMI 220 is also often listed near 68 microns, making this one of the closer matching grades.

Can I convert grit to microns with one formula?

Not reliably. Abrasive standards are based on particle-size distributions, not a simple universal equation. A lookup chart is safer than a formula, especially for fine grits.