About Us

Ruler.digital is a convenient and accurate online ruler on the screen in inches and centimeters/millimeters for any device.

The inspiration for Ruler.digital was born when I found it difficult under certain circumstances to accurately measure the dimensions of my browser window on my mobile phone, because the standard ruler tool was not reliable.

We launched Ruler.digital in 2012 as a side project during my time at University in London and had great success due to its usability for both students and teachers, as well as its cross-browser compatibility on devices such as tablets and laptops.  Ruler.digital is now used daily by thousands of people around the world!

Ruler.digital is a convenient and accurate online ruler on the screen in inches and centimeters/millimeters for any device.  Ruler.digital was started to solve a problem I had with the rulers we used in our architecture studio.  We wanted to use an easy-to-read but accurate tool.

We get requests from parents, teachers and other professionals who want to measure parts of the printed design digitally rather than on paper, saving time and money in post-production.

Ruler is a free online ruler in inches and cm/mm.  Ruler is designed to work on all devices, including smartphones, tablets, laptops, PCs and Macs. Ruler doesn’t require any plugins or downloads, it’s always just a tap away.  It’s fast, easy and accurate for anyone who needs a measuring tool close at hand while on the go.

It started one day when I needed to measure something on my iPhone.  I had to use three apps because they could only do fractions of an inch or centimeter, while I needed an inch and a half.  That’s when I realized we need something that can cover as many perspectives as possible, which led me to create Ruler that is now used by over 200 million people worldwide!