Equal-length cutting calculator
Calculate how many identical pieces fit on one bar and how much stock a batch needs, including kerf and end trim.
Equal-length cutting calculator
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The method
Usable length = stock − 2 × end trim. Pieces per bar = floor((usable length + kerf) ÷ (piece length + kerf)). Stock bars = ceil(required pieces ÷ pieces per bar).
With 2,400 mm stock, 450 mm pieces, a 3 mm kerf and 10 mm trim at each end, five pieces fit per bar. Twelve pieces need three bars, with two pieces on the last bar.
How it works
- Enter one stock length and the required finished length.
- Set kerf, trim for each end and the total pieces wanted.
- Read pieces per bar, total bars, and leftover material.
Good questions
Why add kerf to the numerator?＋
The final piece can use the exact end of the usable stock without needing another full kerf beyond it.
Does every bar need both end trims?＋
Yes. This calculator applies the same per-end trim to every bar it uses. Enter zero when you do not need trim.
Does the last bar contain spare pieces?＋
No. The estimate only cuts the number of pieces requested and leaves the rest as an offcut.