Screen Size Calculator
Calculate screen size from technical measurements.
Loading calculator…
What this tool does
Calculate screen size from technical measurements. Visible rectangular panel dimensions; bezels and chassis excluded.
How to use the Screen Size Calculator
- Enter or select screen diagonal in in.
- Enter or select aspect width.
- Enter or select aspect height.
- Read the calculated result; change any measurement to compare alternatives.
Formula
width=diagonal×a/sqrt(a²+b²); height=diagonal×b/sqrt(a²+b²)
- diagonal
- Screen diagonal (in, before metric conversion)
- a
- Aspect width
- b
- Aspect height
Visible rectangular panel dimensions; bezels and chassis excluded.
Worked example
For screen size calculator, the following measurements illustrate the exact method: Screen diagonal: 55; Aspect width: 16; Aspect height: 9.
Inputs
- Screen diagonal55 in
- Aspect width16
- Aspect height9
Result
- Screen width47.94 in
- Screen height26.96 in
Results explained
- Screen width
- Screen width from the formula above, expressed in in before metric conversion. Visible rectangular panel dimensions; bezels and chassis excluded.
- Screen height
- Screen height from the formula above, expressed in in before metric conversion. Visible rectangular panel dimensions; bezels and chassis excluded.
Frequently asked questions
width=diagonal×a/sqrt(a²+b²); height=diagonal×b/sqrt(a²+b²)
Visible rectangular panel dimensions; bezels and chassis excluded.
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.