Free 4x8 plywood cut calculator

What this 4x8 plywood cut calculator does

The 4x8 sheet (48 x 96 in, or 1220 x 2440 mm) is the standard panel at every home center, so most plywood projects start here. This calculator takes your list of parts (their length, width and quantity) and works out how to lay them out on full 4x8 sheets with as little waste as possible. Instead of sketching the layout on the back of a receipt, you get a numbered cutting plan, a clear cut list, and the exact number of sheets to buy. cutlistlab runs entirely in your browser, with nothing to install and no account needed. The defaults are set up for a 4x8 sheet, but you can enter any size if you are working with a half sheet or an odd panel.

How to use it

1. Set your units and enter your parts. Switch to inches, then add each part with its length, width and quantity. Name your parts so they are easy to match when you start cutting.
2. Pick the 4x8 sheet. Choose the standard 48 x 96 in panel (1220 x 2440 mm). Add any offcuts you already have so they get used before you open a fresh sheet.
3. Set the kerf. Enter the width your saw blade removes per cut, usually about 1/8 in, so the parts come out exactly to size.
4. Read the plan. The calculator packs everything onto the fewest 4x8 sheets, shows each sheet as a drawing, lists the cuts in order, and tells you how many sheets you need and how much is left over.

Getting the most out of a 4x8 sheet

Plywood is expensive, so every full sheet you avoid buying counts. The calculator tries several packing strategies and keeps the best result, which usually beats laying parts out by eye. A few things make a real difference on a 4x8 sheet specifically:

• Grain direction. Plywood has a visible face grain that runs along the 8 ft length. Mark a part as grain-fixed and it stays oriented the right way; parts without grain rotate freely to pack tighter.
• Plan around your rip width. If you cut with a circular saw and a rail, long rip cuts down the length of the 4x8 sheet are the cleanest. The plan keeps cuts simple and shows them in order.
• Offcuts as stock. Add leftover pieces from earlier projects and the calculator uses them before cutting into a full 4x8 sheet, so the same sheet stretches further.
• Kerf and trim. The blade width and any rough edge you trim off the sheet are included, so the count of sheets is realistic, not just theoretical.

A worked example

It helps to see how a real cut list lands on a 4ft x 8ft sheet (2440 x 1220 mm). As an example, say you need the parts below for a small shelf unit. Enter them in inches or millimetres, the calculator handles both, then pick a goal: least waste, fewest cuts, or lowest cost.

With kerf and grain direction set, a list like this typically uses about 1 sheet, with roughly 15% offcut. You get a numbered cutting order for the workshop or the store's panel saw, parts you can rotate or nudge by hand, optional edge-band and label notes, and a CSV export. Any usable offcut goes to your scrap library for the next project. Treat the result as an example, not a guarantee: your exact parts and kerf will shift the numbers.

Frequently asked questions