Monitor Viewing Distance Calculator
Get the exact sitting distance for your monitor and resolution. Stop squinting; stop straining.
The wrong monitor distance causes problems people blame on the monitor itself: eye fatigue from too close, neck strain from too far, blurry text, and the constant urge to lean forward or back. The right distance is a function of just two variables — screen size and resolution — and it changes the comfortable working day more than any other ergonomic adjustment besides desk height.
The calculator uses the eye's 1-arc-minute visual acuity threshold (60 pixels per degree) to find the closest distance at which individual pixels disappear into a uniform image. For a 27" 4K monitor, that distance is about 24". For a 27" 1440p monitor, about 32". For a 27" 1080p monitor, you should sit 48"+ away — which is why 1080p at 27" feels grainy at normal desk distance. Higher-resolution monitors let you sit closer, not because closer is better, but because they remain sharp at distances that match real desk depths.
We also surface a comfortable range, not just a single number. Below the minimum, your eyes can't take in the whole screen without scanning, which causes neck and eye fatigue. Past the maximum, small text becomes unreadable and you find yourself leaning in. The middle of the range is where most people land naturally once their setup is right.
Resolution
Ideal viewing distance
Sweet spot
21.1in
54 cm · 1.8 ft
Min (full immersion)
17.9"
Max (clear text)
33.7"
How this works
What's the formula?
Optimal distance = screen height × pixels-per-degree × (180/π) ÷ vertical pixels. The denominator is your screen's vertical pixel count; the numerator is calibrated to the eye's 1-arc-minute acuity threshold at ~60 PPD. In practice, this means most 27" 4K monitors land at ~24–28 inches — almost exactly normal arm's length.
Why does resolution matter so much?
At the same screen size, a 4K display packs ~4× more pixels than 1080p. You can sit closer without seeing individual pixels — making 4K ideal for "immersive" desktop setups at typical arm's-length distance. A 1080p 27" monitor at the same distance shows visible pixel grid; the same monitor in 4K does not.
How close is too close?
Below the minimum distance, you'll see pixel grid lines and antialiasing artifacts, and your eyes can't take in the whole screen without scanning. Below ~70% of the optimal distance is uncomfortable for most people. Closer also means more eye strain because the focusing muscles work harder to keep near objects sharp.
How far is too far?
Past the maximum, you start losing readable text and missing small UI details. The numbers above keep text crisp without straining to see. If you find yourself leaning forward to read code or small fonts, you're too far — either move closer or increase OS-level text scaling.
Does aspect ratio change the calculation?
Yes — ultrawide (21:9) and super-ultrawide (32:9) monitors need different distances because the edges fall outside your central vision. For ultrawides, multiply the calculated distance by 1.1; for super-ultrawides, by 1.2. Past that, the edges become peripheral and you stop noticing detail there anyway.
What about curved monitors?
Curved monitors (1800R, 1500R, 1000R) are designed to keep more of the screen at uniform distance from your eyes. The optimal viewing distance for a curved monitor is the curvature radius itself (e.g. 1500R = 1500mm = ~59"). At that distance every point of the screen is equidistant.
How does monitor distance interact with desk depth?
Desks under 24" deep force most 27" monitors closer than optimal; desks 28"+ give you flexibility. If your desk is shallow, a monitor arm lets you push the screen further back over the desk's rear edge. Without one, you're stuck with whatever the depth allows.
What about dual or triple monitor setups?
Each screen should sit at its calculated optimal distance, which for a triple-monitor setup means angling the side monitors inward (toe-in). Side screens become harder to read at very small font sizes — most people upscale text 110–125% on side displays.
Does the math work for TVs used as monitors?
It does, but 4K TVs at 43–55" become uncomfortable as desktop monitors because the optimal distance (~3–4 feet) doesn't match typical desk depth. Better to pick a 32" 4K monitor at proper distance than a 43" TV at the wrong distance. The latter causes neck rotation strain over time.