This is a real-size web ruler viewed in the iPad browser.
→If you want to measure angles, please use a web protractor
※The site may not be displayed correctly on PC and some Android browsers.
The ruler image on the right measures up to approx. 20cm in length.
If you are using a smartphone other than iPad, please select your model below.
When you don't have a ruler, you can measure length with your smartphone.
There is no need to install an app.
Just launch the browser on your smartphone and you can use the ruler of actual size to measure the length.
There is also a service to download a printable ruler that can print and measure up to 1 meter, a printable triangular ruler that can measure up to 10 cm, and a circular ruler that can measure from 5 mm to 60 mm in diameter.
For requests or inquiries about the site, please fill out the form using the button below.