Is there an online ruler?
Convenient ruler on screen
This is an online virtual ruler, it could be adjusted to an actual size, and has both metric and imperial scale units, before you use it, please set the pixels per inch to your own device.
How do I use my phone as a ruler?
How to use your iPhone or Android phone as a ruler
- Open the app. (Image credit: TechRadar) ...
- Set the start. (Image credit: TechRadar) ...
- Set the end point. (Image credit: TechRadar) ...
- See the distance. (Image credit: TechRadar) ...
- Get the area. (Image credit: TechRadar) ...
- Check the accuracy. ...
- Share the number. ...
- Check the level.