Screen & Display Calculators
4 tools in this collection — free, instant, and private in your browser.
Screen and display calculators help you make informed decisions about television placement, monitor selection, and digital image resolution. With so many screen sizes, aspect ratios, and pixel densities on the market, a few quick calculations can prevent an expensive purchase that looks wrong in practice or a display setup that strains your eyes.
The TV Size Calculator works out the ideal screen diagonal for a given room layout and seating arrangement, taking into account the resolution of the display and the acuity of human vision. Its companion, the TV Viewing Distance Calculator, approaches the same problem from the other direction: enter the screen size you already own or plan to buy, and it returns the minimum and recommended distances at which the picture will look sharp and fill your field of view comfortably.
The Monitor PPI Calculator (pixels per inch) quantifies the pixel density of a display from its resolution and physical screen size. PPI is the single most important factor in perceived image sharpness. A higher PPI means finer detail and text that appears smooth without antialiasing artefacts. This tool is particularly useful when comparing monitors at different size and resolution combinations, where the quoted resolution alone can be misleading.
The Digital Resolution Converter translates between common resolution standards and formats, making it useful for video production, web design, and photography workflows where you need to confirm that an asset will display at the correct size on a target device or export setting.
When choosing between these tools, start with your constraint. If you are furnishing a room, begin with the TV Size or Viewing Distance calculators. If you are buying a monitor for work or creative tasks and sharpness matters, run the PPI calculation on every shortlisted model. If you are working with digital content at a specific resolution, use the Resolution Converter to check compatibility with your destination format.
All screen & display calculators
All converter tools →Compare these tools
| Tool | What it does |
|---|---|
| Digital Resolution Converter | Convert digital resolution between dots per inch (DPI), pixels per inch (PPI), dots per centimetre (DPCM), and dots per millimetre (DPMM). |
| Monitor PPI Calculator | Calculate the pixel density (PPI) of any monitor from its resolution and diagonal size. |
| TV Size Calculator | Convert TV diagonal size to width and height in inches and cm. Supports 16:9 and 4:3 aspect ratios. |
| TV Viewing Distance Calculator | Calculate the recommended viewing distance for your TV size in feet and metres. |
Frequently asked questions
- What PPI is considered sharp for a desktop monitor?
- At a typical desktop viewing distance of 50 to 70 centimetres, most people cannot resolve individual pixels above about 90 to 110 PPI. Many designers and programmers prefer 140 PPI or higher for crisp text. Apple Retina displays target roughly 220 PPI at their intended viewing distances. The Monitor PPI Calculator lets you compare any combination of size and resolution so you can decide whether a given model meets your standard.
- Does the TV Viewing Distance Calculator account for 4K versus 1080p screens?
- Yes. The calculator factors in display resolution because a 4K screen can be viewed from closer distances before individual pixels become visible. At the same screen size, a 4K television has a shorter minimum viewing distance than a 1080p model, so the recommended range shifts accordingly.
- What is the Digital Resolution Converter useful for?
- It is helpful whenever you need to reconcile resolutions between different devices, export targets, or aspect ratios. For example, you can confirm whether a social media image at a given pixel dimension will fill a phone screen without cropping, or verify that a video asset matches the resolution specification required by a streaming platform.