If you don't see an Printable Ruler design or category that you want, please take a moment to let us know what you are looking for. Hit Calculate Scale to calculate the scale. ð How to use this online ruler For the ruler to display correctly (i.e., in proportion to the actual physical size), it must be calibrated . The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm). , show ruler adjuster Adjust scale and total ruler length and print templates at 100% printer scale. would you like. The small ones are in a gray and blue color while the bigger one is yellow. Choose from our selection of metric rulers, including over 200 products in a wide range of styles and sizes. Description. Please set your monitor size (inches) ... scale just got expanded, measured length of my pencil by setting screen size 11 inch , was 7.7 then when i set it ⦠Save this settings. Metric Ruler. i am lucky and found my screen has 100 PPI. we have a scale conversion calculator, AU $3.00 postage. for (i=1;i