Slitting yield calculator
Enter the master roll width and the width you want. It tells you how many rolls come off each pass, how much goes to the floor as trim, and which nearby widths would yield better.
Nothing is sent anywhere — the arithmetic runs in your browser. No sign-up, no email.
your rolls edge trim leftover strip
Same master roll. Widths within 15% of yours, sorted by yield.
Nothing nearby beats your width — it already nests well.
Your width stays as it is. The strip that would be thrown away, cut into a usable second width.
The leftover is too narrow to slit into anything sellable.
Slitting arithmetic only. Real yield also depends on the trim your construction needs, whether a leftover strip is wide enough to sell, and the roll length and core your machine takes. Nothing here is a quotation — send us the width band and application and we will confirm what actually nests on the construction you want.
About this video
How to use the free slitting yield calculator at www.leetaiheng.com/tools/slitting-calculator/. Enter the master roll width (ask your supplier; it varies by construction), the width you want (the finished slit width) and the edge trim on each side, all in mm. The page applies this arithmetic: usable width = master width − 2 × edge trim; slits per pass = usable width ÷ your width, rounded down; leftover strip = usable width − slits × your width; material yield = slits × your width ÷ master width; unused per pass = 2 × edge trim + leftover. Zero edge trim is the theoretical best case, so ask your supplier for the real figure. A width a few millimetres wider can drop the number of slits per pass by one, leaving a much wider unusable strip, and that trim is charged to the order that caused it. Example values only (the page's prefilled example): a 1500 mm master roll, 1400 mm wanted and 0 mm edge trim give 1 slit per pass, 93.3% material yield and 100 mm unused per pass. The calculator also lists nearby widths within 15% of yours that yield better (here 1500 mm, 100.0%) and a second width cut from the leftover strip while your width stays as it is (here 1 roll at 100 mm, 100.0%). It is slitting arithmetic only, not a quotation: send the width band and application with your inquiry and we will confirm what actually nests on the construction you want. The arithmetic runs in your browser; no sign-up. Example values are not a product specification.
- Slit width and roll format: ordering without waste — why "just add 2 cm" can raise the price
- MOQ, lead time and samples — how trim waste lands on the minimum order
- How to specify reflective roll goods — the rest of the spec
Questions
What is slitting yield?
The share of the master roll width that ends up in finished rolls. Usable width divided by master width, after edge trim and after the leftover strip that is too narrow to sell.
Why does a slightly wider roll sometimes cost more per square metre?
Because it can drop the number of slits per pass by one. Going from four slits to three leaves a much wider unusable strip, and that trim is charged to the order that caused it. The calculator shows this: raise your width by a few millimetres and watch the yield fall off a cliff at the point a slit is lost.
What edge trim should I enter?
Edge trim removes the unstable outer edge of the web before slitting. How much is needed varies by construction and by line, so the calculator starts at zero — that gives you the theoretical best case. Ask your supplier for the trim that applies to your construction and enter it; the yield will drop, and by how much is worth knowing before you fix a width.
Do I need to know the master roll width?
Yes — the arithmetic depends on it and it varies by construction and by supplier. Ask before you fix your width. This tool does not assume any particular master width.
Can I order two different widths off one master roll?
Often yes, and it is the easiest way to raise yield without touching the width you actually need. The calculator keeps your width fixed and shows what the leftover strip could be slit into instead of going to the floor. Whether the second width is useful to you, and whether the supplier will run it, is a commercial question — but it is worth asking before you accept the waste.