OnlineScreenScale was built around one frustration: a spec sheet lists a single diagonal number, and that number alone can't tell you whether a monitor will actually feel wide, tall, or roomy on your desk. This site exists to answer "how much bigger is this, really?" visually, in your browser, without opening a spreadsheet.
What This Tool Actually Does
The Visual Size Comparison tool lets you set up to six displays — any diagonal from 5″ to 100″, across seven aspect ratios, flat or curved — and see their true width, height, and surface area drawn to scale, overlaid or side by side. The Multi-Monitor Setup Simulator arranges several monitors in a row to estimate combined desk width. Build Your Own Monitor Setup goes further: drag monitors into any arrangement, including stacked or offset layouts, and check the result against real desk dimensions and viewing distance. Every one of these runs entirely client-side — nothing you configure is sent to a server.
Who It's For
Anyone comparing monitors, TVs, laptops, or tablets before a purchase: gamers deciding between an ultrawide and a standard panel, developers weighing a 32″ screen against dual monitors, or someone just trying to work out if a secondhand display will actually fit their desk. The tool is free, requires no account, and doesn't collect the sizes or setups you enter.
How the Numbers Are Calculated
Every width, height, and area figure comes from the same geometry: diagonal size and aspect ratio, run through the Pythagorean theorem. PPI comes from resolution divided by diagonal size. None of it is looked up from a manufacturer database — it's calculated fresh every time you change an input. The full formulas, worked examples, and known limitations are laid out on the methodology page, including where these estimates can't replace an official spec sheet.
Who Built This
Bhuvanesh M H
Creator and maintainer of OnlineScreenScale
OnlineScreenScale is independently built and maintained by Bhuvanesh M H. It isn't affiliated with, endorsed by, or sponsored by any monitor, TV, or display manufacturer — it's a personal project made to solve a genuinely annoying problem: comparing screen sizes without a tape measure or a spreadsheet. Questions or feedback are welcome via the contact page.
Limitations, Honestly
These are geometric estimates, not laboratory measurements. They don't account for a monitor's chassis, stand footprint, or exact bezel width, and curved-screen numbers use the same flat width/height convention manufacturers themselves publish. Always check the official spec sheet before a final purchase — this tool is for comparing and planning, not for replacing that step. Full detail is on the methodology page.