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Sanding Grit Progression Planner
Skipping grits leaves old scratches trapped under your finish. Pick your starting condition and target quality to get the right sequence — and roughly how many sheets to buy.
Why the sequence matters
Each grit can only sand out the scratch pattern left by the grit before it. A common shop rule is not to jump much beyond roughly double the previous grit number at each step, which is exactly how these sequences are built — from a coarse starting grit through to whatever fineness your target finish needs.
Estimating sheets per stage
Coarser grits load up with removed material fast and wear out over a smaller area, while finer grits remove very little per pass and last much longer. This planner uses a simple coverage-per-sheet assumption for coarse, medium and fine grit tiers to estimate roughly how many sheets or discs each stage will use across your surface area.
Frequently asked questions
Why does the grit sequence matter instead of just starting with a fine grit?
Each grit can only remove the scratches left by the grit before it. Skipping too far ahead leaves deeper marks from an earlier stage still visible under the finish, especially once stain or oil highlights them — working through a steady progression is what actually gets a surface smooth.
How big a jump between grits is safe?
A common rule of thumb is not much more than doubling the grit number at each step (for example 80 to 150 is a reasonable jump, 80 straight to 220 usually is not). The sequences here follow that guideline.
Why do sheets last longer at finer grits?
Coarser grits cut faster and load up with removed material and old finish more quickly, so they wear out over less area. Finer grits remove very little material per pass and stay usable over a larger surface before they dull.
Does this work for power sanders as well as hand sanding?
Yes, the same grit progression logic applies — this estimate is for standard sanding sheets or discs; a random orbital sander or belt sander will get through the area faster in time, but should still burn through roughly the same number of sheets per stage.