Screen Distance Calculator

Viewing distance affects comfort, posture, and how large on-screen detail appears. Ergonomic guidance often suggests placing monitors roughly an arm’s length away and adjusting for screen size and task.

This calculator offers educational distance ranges. It does not diagnose digital eye strain or prescribe computer glasses.

Follow these educational steps:

1. Enter diagonal screen size and choose a screen type if prompted.
2. Review the suggested distance range and positioning tips.
3. Adjust chair height, screen top near or slightly below eye level, and glare sources.
4. Combine distance changes with blink breaks and text scaling.

If you sit much closer than the suggested range, detail may feel larger but neck/eye fatigue can increase for some people. Sitting extremely far can encourage leaning and squinting.

Comfort is individual — use the range as a starting point, then prioritize clear posture and breaks.

This is not a medical treatment for headaches or dry eye.

It does not prove blue-light glasses are required or unnecessary.

Important limitations:

• Multiple monitors, ultra-wide displays, and VR are special cases.
• Children’s classroom devices need age-appropriate ergonomics and outdoor time habits beyond distance alone.

If screen tasks cause persistent headaches, eye pain, or vision changes, get an eye exam. Sudden symptoms with neurological signs need urgent care.