Curved Monitor Viewing Distance Calculator

The R number (e.g. 1800R, 1500R) is the radius of curvature in millimetres. A 1800R monitor is curved as if it were cut from the edge of a circle with an 1800mm (1.8m) radius. A lower R number means a tighter, more pronounced curve; a higher R number (e.g. 3800R, 4000R) means a gentler, more subtle curve.

The most common industry rule of thumb is that the curvature rating in millimetres approximates the distance, in millimetres, at which every point on the curved screen is equidistant from your eyes - so an 1800R monitor's curvature-matched distance is about 1800mm (180cm). This calculator applies that rule and also shows your horizontal field of view at whatever distance you actually sit.

No. The radius-matched distance describes the geometry the panel was designed around, not a mandatory seating position. Most people sit at a normal desk distance (roughly 50-100cm) regardless of curvature, and still get the curve's main practical benefit - reduced edge distortion and less eye travel to the corners of the screen - compared with a flat panel at the same distance.

For typical desk use, 60-90cm works well for most people and screen sizes, matching general display screen ergonomics guidance. The literal curvature-matched distance for 1800R (180cm) is usually far more than a desk allows, and isn't necessary for a comfortable experience.

Yes, in terms of the radius-matched rule: a 1000R monitor's curvature-matched distance is about 100cm, versus 300cm for a 3000R monitor. In practice, tighter curves are usually paired with smaller or narrower screens (competitive gaming monitors), which are naturally viewed from closer desk distances anyway.

Curvature itself doesn't change your horizontal field of view - that's determined by screen width and viewing distance, exactly as with a flat screen. What curvature changes is how uniform the image looks across that field of view: on a flat screen, the edges are further from your eyes than the centre, causing mild stretching or distortion at the corners; a curved screen reduces that by keeping the surface closer to equidistant.

Sagitta is the geometric term for how far the centre of a curved screen sits back (or, from your side, bows toward you) compared with a straight line drawn between its two edges. A larger sagitta means a more noticeably curved panel. It's calculated from the curvature radius and the screen's physical width.

Curved monitors can reduce the amount your eyes need to refocus between the centre and edges of a wide screen, which some users find more comfortable over long sessions, especially on ultrawide and super-ultrawide sizes. Evidence is largely anecdotal rather than clinical, and general ergonomics factors - distance, screen height, breaks, lighting - matter at least as much as curvature.

The Health and Safety Executive's display screen equipment (DSE) guidance recommends viewing your screen from roughly arm's length, commonly cited as about 40-70cm, with the top of the screen at or just below eye level. This is general workstation guidance and isn't specific to curved monitors or gaming setups.

You need at least your chosen viewing distance plus the monitor's own stand depth (commonly 20-30cm for a curved monitor with cable management). For a 70cm viewing distance that typically means at least 90-100cm of usable desk depth from the wall or desk edge to your seating position.

Aspect ratio changes the screen's physical width for a given diagonal size, which changes your field of view at any given distance, but it doesn't change the curvature-matched distance - that depends only on the curvature radius. A 32:9 screen at the same diagonal size as a 21:9 screen is wider and shorter, so it gives a wider field of view at the same viewing distance.

Yes - select "Flat (no curve)" and the calculator will skip the curvature-specific figures (curvature-matched distance and curve depth) and instead show the general practical desk distance range, along with your field of view at your entered distance.

Sitting very close increases your field of view and can mean your eyes travel further to scan the whole screen, which may contribute to fatigue over long sessions, similar to sitting too close to any large monitor. There's no universal minimum distance, but general display screen guidance around 40cm or more is a reasonable floor for sustained use.

Resolution affects how far you need to be before individual pixels become imperceptible (a sharpness consideration), not the curvature-matched distance calculated here, which is purely geometric. A higher-resolution panel of the same size and curvature can generally be viewed slightly closer before pixel structure becomes noticeable.

Pick the closest listed curvature to get a very similar estimate - the relationship between curvature rating and viewing distance is linear, so a 1600R monitor's curvature-matched distance (160cm) sits almost exactly between the 1500R (150cm) and 1800R (180cm) results shown here.