Cut a square, measure the square piece that comes out, and get your kerf.
Free · No sign-up · Works in your browser
Example: a 20 mm square in the design that came out 19.8 mm wide. Type your own measurements to replace it.
Square in your design minus the piece that came out: 20 − 19.8 = 0.2 mm. This assumes no kerf offset and a piece measured across two parallel straight edges. The hole it left measures about 20.2 mm.
To cut parts at their drawn size, offset outer cut lines outward and hole outlines inward by half the kerf: 0.1 mm.
This estimate is not a minimum safe feature size. A gap, bridge, loose piece and stroked line need different checks. Use a threshold based on your own process in the SVG checker.
Dark lines cut. Red lines are folds: set them to Score in your software; the color alone won’t do it. The PDF draws cut and fold lines in black at full size. Print at actual size on a sheet large enough for the page.
Your file stays on your device; nothing is uploaded.
Cut a square with no kerf offset and measure the square piece that comes out, across two straight edges. The square’s size in your design minus the width of that piece is your kerf; the hole it leaves is wider than the design by the same amount. It doesn’t tell you how thin a bridge, gap or piece can safely be. Enter your own threshold in the checker.
EveryCutFile