How many 18" × 22-1/2" pieces can you cut from a 4×8 sheet?
You can cut 10 pieces of 18" × 22-1/2" from one 4×8 sheet (48" × 96") with a 1/8" saw kerf and rotation allowed — 88% of the sheet ends up in parts. Sizes like this are typical for base cabinet bottoms and shelves.
The layout is a straight grid, 2 across and 5 along the length, every part turned across the sheet. 88% is a solid yield for a single part size; 12% goes to kerf and offcut.
Kerf and grain
The 1/8" kerf doesn't cost a part here: 10 fit with or without it. There's still 2-3/4" × 96" left over after the last cut.
Rotation is doing real work. With the grain locked, so every part's 22-1/2" side runs along the sheet's 96" length, only 8 fit — the other 2 come from turning parts across the sheet. That's fine for paint-grade plywood, MDF or melamine; for show faces with visible grain, plan on 8 per sheet.
| Saw kerf | Rotation allowed | Grain-locked (no rotation) |
|---|---|---|
| 1/8" | 10 · 88% | 8 · 70% |
| None (theoretical) | 10 · 88% | 8 · 70% |
How many sheets for a batch?
| Pieces needed | 4×8 sheets | Last sheet |
|---|---|---|
| 10 | 1 | full |
| 25 | 3 | 5 of 10 — room for 5 more |
| 50 | 5 | full |
Same 1/8" kerf, rotation allowed. A part-filled last sheet is the place to nest drawer bottoms, shelves or anything else from the same material.
FAQ
How many 18x22-1/2 pieces can you cut from a 4×8 sheet?
You can cut 10 pieces of 18" × 22-1/2" from one 4×8 sheet (48" × 96") with a 1/8" saw kerf and rotation allowed — 88% of the sheet ends up in parts. The layout is a straight grid, 2 across and 5 along the length, every part turned across the sheet.
Does grain direction change how many 18" × 22-1/2" pieces fit?
Rotation is doing real work. With the grain locked, so every part's 22-1/2" side runs along the sheet's 96" length, only 8 fit — the other 2 come from turning parts across the sheet. That's fine for paint-grade plywood, MDF or melamine; for show faces with visible grain, plan on 8 per sheet.
How many 4×8 sheets do I need for 25 pieces at 18" × 22-1/2"?
3 sheets. At 10 per sheet, the last one carries 5 parts, leaving room for 5 more.
How this was worked out
EZNESTING's nesting engine (the same one the optimizer runs, in its default least-waste guillotine mode) was given more 18" × 22-1/2" parts than could possibly fit on one 48" × 96" sheet, with a 1/8" kerf between parts and none at the factory edges. The parts it placed are the answer. That count is checked against simple grid layouts in both orientations (best of those: 10), so the page never shows less than a straight grid would give. No edge trim is assumed; if you skim 1/4" off a factory edge, re-run it in the optimizer with trim set.
Nearby sizes
- 16" × 24" from a 4×8 sheet — 8 per sheet
- 12" × 30" from a 4×8 sheet — 10 per sheet
- 11-1/4" × 42" from a 4×8 sheet — 9 per sheet
- 11-1/4" × 30" from a 4×8 sheet — 12 per sheet
Try any size in the sheet yield calculator, or lay out a full cut list with the plywood cut list optimizer, the 4×8 plywood cut calculator or the nesting optimizer.