Viewing Distance Calculator
Calculate viewing distance from technical measurements.
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What this tool does
Calculate viewing distance from technical measurements. Personal viewing angle target, not a vision-health recommendation.
How to use the Viewing Distance Calculator
- Enter or select screen width in in.
- Enter or select desired horizontal viewing angle (degrees).
- Read the calculated result; change any measurement to compare alternatives.
Formula
viewing distance=screen width/(2×tan(viewing angle/2))
- width
- Screen width (in, before metric conversion)
- angle
- Desired horizontal viewing angle (degrees)
Personal viewing angle target, not a vision-health recommendation.
Worked example
For viewing distance calculator, the following measurements illustrate the exact method: Screen width: 48; Desired horizontal viewing angle (degrees): 30.
Inputs
- Screen width48 in
- Desired horizontal viewing angle (degrees)30
Result
- Viewing distance89.57 in
Results explained
- Viewing distance
- Viewing distance from the formula above, expressed in in before metric conversion. Personal viewing angle target, not a vision-health recommendation.
Frequently asked questions
viewing distance=screen width/(2×tan(viewing angle/2))
Personal viewing angle target, not a vision-health recommendation.
Units appear in input and result labels. Keep lengths, pixel counts, bitrate and time units consistent.
Mathematical results follow the stated model; actual lenses, compression, viewing preferences and device specifications may differ.
No. It calculates from your entered values entirely in the browser.