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Grit profile

150grit sandpaper

Medium-Fine

Pre-paint smoothness. Ready for primer.

150 grit in other scales

If the pack says 150 (CAMI, most US paper)

~92 µmAbout the same as P150.

If it says P150 (FEPA, Festool, Mirka, Norton 3X)

~100 µmAbout the same as CAMI 150.P150, converted →

Sizes are average particle diameters from the published CAMI and FEPA tables. Full ladder in the grit chart; any grade on any scale in the grit converter.

What 150 grit is for

150-grit is the bridge between rough shaping and finish prep. It’s a good final grit for painted projects and a good intermediate before 180 or 220 for stained ones. Most random orbital sanders are happiest in this range.

Projects at 150 grit

  • · Final pass before primer (most paint projects)
  • · Intermediate grit between 100 and 220 on hardwood
  • · Smoothing solid-surface counter edges
  • · Pre-paint scuff on previously-painted trim
  • · Smoothing wood-filler patches

Abrasive materials

  • · aluminum oxide
  • · silicon carbide
  • · ceramic
  • · garnet

Common mistake

Don’t mix 150 and 180: pick one and commit. Working both wastes steps for results identical to the human eye.

← 120 grit (the step before)180 grit (the step after) →

Top pick at 150

3M Pro Grade Precision Assorted Pack

Five grits. One box. Everything you need to finish what you started.

Check priceReview

Catalog fit

64

Current SKU matches in this grit lane.

Common forms

5

Forms represented here, led by discs.

Head to head

4

Comparison pages currently touching this stage of the sanding climb.

Use this grit when

The surface still needs this stage.

  • · Pre-paint smoothness. Ready for primer.
  • · This is the working middle of most sanding progressions: enough bite to matter, refined enough not to leave the job stranded.
  • · On this site, 150 grit shows up most around metal finishing, Festool sanders, fine furniture, and knife making.

Skip this grit when

The job is earlier or later than this.

  • · Skip this grit if you still need heavy stock removal or if the surface is already ready for polish-level refinement.
  • · Skip the urge to jump straight here from a very coarse grit; the scratch pattern underneath will usually survive the shortcut.

Recommended at this grit.

Head to head

Comparisons in this lane.

Norton 3X Sheet Sandpaper, 220 Grit (20-pack) vs. 3M Pro Grade Precision Assorted Pack

One grit done right, or five grits done well.

Read the breakdown →

Mirka Gold 5-inch Hook & Loop Disc Assortment vs. Diablo 5-inch ROS Discs, 120 Grit (50-pack)

Finnish precision or American volume.

Read the breakdown →

3M Pro Grade Precision Assorted Pack vs. Gator Finishing Multi-Grit 9x11 Sandpaper Pack

Both cover the range. One holds up longer.

Read the breakdown →

Diablo 5-inch ROS Discs, 120 Grit (50-pack) vs. 3M Cubitron II Hookit Disc 5-inch

Fifty cheap discs or one disc that cuts like five.

Read the breakdown →

Questions people ask

The practical part.

What is 150 grit actually for?

150 grit is for pre-paint smoothness. ready for primer. This is the working middle of most sanding progressions: enough bite to matter, refined enough not to leave the job stranded.

What should come before and after 150 grit?

The safe lane is usually 120 -> 150 -> 180. You can stretch that a little on easy material, but large jumps usually leave scratches behind.

Which forms make the most sense at 150 grit?

On UltraRough, this grit shows up most in discs, belts, and sponges. That reflects where shoppers usually need this cut level in the real world.

Keep moving

Follow the climb.

120 gritThe step before 150 grit.180 gritThe next step after 150 grit.DiscsSee discs that commonly show up in this lane.BeltsSee belts that commonly show up in this lane.SpongesSee sponges that commonly show up in this lane.Use the grit selectorStart from the project instead of the number.Sandpaper grit chart: coarse to fineThe full range mapped to projects — every grit from 40 to 3000.Find the right grit for your projectTell us the job; we'll tell you where to start and where to stop.
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