Do you ever wondered if your display is retina? At which distance your screen will look like a retina display? What is your display aspect ratio? Or maybe just want to know your screen PPI/DPI in order to configure Photoshop to see your images at an accurate print size, for that purpose I created this little calculator.
Enter your screen aspect ratio, old TVs use 4:3 and modern TVs use 16:9, some computer screens use other aspect ratios like 16:10 for instance, you can choose a preset or specify your own value.
If you don’t know your screen aspect ratio enter your screen resolution in order to get your aspect ratio above.
Enter your screen dimensions in inches in one of the following fields, this form will automatically change the values on the other fields based on the value you provide, if you only know the width, height or diagonal size it will calculate the other values for you.
Enter your TV or PC screen resolution in pixels, HDTV use 1920x1080px but some computers and TVs have different resolutions, some 4K screens have 3840x2160px, Apple MacBook Pro Retina have 2880x1080 and there is a lot more resolutions on mobile devices.