This diagram only explains the scale, not the physical ruler of the screen. Please use the function below for print calibration.
First print the 100mm line, select 100% or actual size, and then measure with a physical ruler. Calibration only applies to this print setup.
First select the solution target. A disabled item in the input box is the calculated result and will not overwrite the value you entered. Unit switching is converted according to the real physical length.
Example: 20 mm in the picture, scale 1:50, corresponds to the actual length of 1 meter.
After unified into meters, the actual length = the length on the picture × n; the length on the picture = the actual length ÷n; n = the actual length ÷ the length on the picture.
Only supports 1:n linear scale. Does not parse CAD or PDF, does not calculate area/volume ratios, and does not guarantee printer scaling or construction compliance.
Select Actual Length, Drawing Length, or Scale and enter the other two items. The page only handles the 1:n length ratio and does not judge whether the drawing is suitable for construction.