Real Size Ruler

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Real Size Online Ruler

This is an online scale ruler that can be adjusted to an actual size, before you use this ruler, please set the pixels per inch to your own device.

Adjusting this virtual ruler to actual size

There are some ways to know the pixels per inch(PPI) to your devie.
  1. My laptop has a wide screen (13.6"x7.6"), and resolution is 1366x768 pixels, 1366 / 13.6 = 100.44 PPI.
  2. Google display by pixel density, i am lucky and find my screen is 100 PPI.
  3. Check what paper money in your wallet, and search "the width of paper money" online, then adjust the PPI by it.
  4. The most accurate way, after i measure the size of virtual ruler by a actual ruler, i found the markings are not very accurate at 30cm, so i adjust the default pixels per inch(PPI) to 100.7, now i get an online actual size ruler.

Save the pixels per inch (PPI) according your own device, then you can use this next time.
Pixels per inch : , show ruler adjuster

Dragging ruler adjuster left or right to fit the size of the reference, remember to save the setting for next time, after save the setting, refresh your brower to check the result. On the most popular browsers you can press the F5 key or click on the refresh button.

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