Cylinder Percentage Calculator: Arc Length, Chord & Wrap Size
How many centimeters does a percentage of a cylinder cover? Enter a size and a percentage, a target length or an angle, and get the arc length, chord, sagitta and unrolled wrap size, with live diagrams.
Where the covered section begins, measured clockwise from the top of the circle. It doesn't change any lengths. It only rotates the highlighted slice and shifts the unrolled view, which helps when positioning a wrap or texture seam in 3D.
How many digits are shown (0 to 10). Calculations always use full precision. This only rounds what you see and copy.
Results are purely mathematical. They don't account for material thickness, stretch or seams.