Plywood Cut Calculator
Split any sheet into equal pieces with exact kerf math, a cut diagram, and a shareable link.
Advanced options
Kerf in use: — between pieces.
Those settings don’t produce a valid cut — check the sheet size, piece count, and kerf. The kerf is removing more material than the sheet has.
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mm × mm · each of pieces
Decimal: ″ × ″
✓
Common cuts, already worked out
Each link opens the calculator pre-filled. All use a typical 1/8″ blade kerf.
Cutting plywood — common questions
What is kerf and why does it matter when cutting plywood?
Kerf is the width of material the saw blade turns into sawdust on every pass. A typical blade is about 1/8 inch wide, so each cut destroys 1/8 inch of the sheet. With multiple cuts this compounds: splitting a sheet into 4 equal pieces takes 3 cuts and removes 3/8 inch total. Ignore kerf and your last piece comes up short.
How do I figure out my saw’s kerf?
The fastest way is to read the blade. Most blades stamp the kerf width on the body — common values are 1/8 inch (0.125), 3/32 inch thin-kerf (0.094), and 1/16 inch for jigsaw and scroll blades. If nothing is printed, make a cut in scrap and measure the slot with calipers. Then choose “I know my blade width” and enter that number.
Can I cut a 4×8 sheet into 3 equal pieces?
Yes. Cutting the 96-inch length into 3 pieces takes 2 cuts. With a 1/8-inch kerf that removes 1/4 inch total, so each piece is (96 − 0.25) ÷ 3 = 31.917 inches, about 31 15/16 inches. Set pieces to 3 in the calculator to see the exact fraction and diagram.
What is the typical kerf for a table saw versus a circular saw?
A standard table saw blade and a standard circular saw blade are both about 1/8 inch (3.2 mm). Thin-kerf blades on either tool drop to roughly 3/32 inch (2.4 mm). Track saws are usually around 3/32 inch, and jigsaws around 1/16 inch (1.6 mm). The calculator pre-loads these typical values when you pick a saw.
How accurate are these measurements?
The math is exact for the kerf value you enter. Real-world accuracy depends on your blade, a square fence, and a straight cut. Treat the result as your target dimension, cut slightly proud if precision is critical, and always measure the actual sheet — nominal “4×8” panels can run a fraction over or under.
Should I account for kerf on every cut?
For equal pieces from one sheet, yes — every cut between two pieces removes one kerf width. The number of kerf-consuming cuts is always the number of pieces minus one. The two outside edges of the sheet do not cost a kerf because there is no piece on the far side.
What if I need pieces of different sizes?
This calculator solves for equal pieces, the most common shop task. For a mixed cut list — several different part sizes packed into one sheet — you need a cutlist optimizer that arranges parts in two dimensions. That tool is on the HandyConvert roadmap; for now, run this calculator once per group of same-size pieces.