Example 1
- 1920×1080
- 24 in
91,8
What PPI at 1920×1080 on 24 in? 91,8. A typed diagonal, not EDID.
Resolution and PPI
Type width, height, and a diagonal. 1920×1080 on 24 in give 91,8. 2560×1440 on 27 give 108,8. 3840×2160 on 32 give 137,7. A typed diagonal, not EDID.
sqrt(w²+h²) / diagonal_in. Not EDID from a monitor. PX and REM sit on PX ↔ REM Converter.
Results
Enter data and click Calculate.
How it works
Resolution and PPI in this calculator divides the pixel diagonal by typed inches. 1920×1080 on 24 in give 91,8. 2560×1440 on 27 give 108,8. 3840×2160 on 32 give 137,7. PPI = sqrt(w²+h²) / in. This is not EDID.
Fields: ppi-w, ppi-h, ppi-diag. Select ppi-diag-unit stays in in the examples. sqrt(1920²+1080²) / 24 ≈ 91,8. 2560×1440 / 27 ≈ 108,8. 3840×2160 / 32 ≈ 137,7.
91,8 does not come from the OSD. 108,8 is not EDID. 137,7 does not know Windows scaling. You type the pixels and the diagonal. The calculator does not read a monitor.
PX ↔ REM next door divides px by root. HEX to RGB converts a colour. Here 1920×1080 on 24 stays 91,8, the typed diagonal alone.
Type 1920, 1080 and 24, unit in, then Calculate. The result is 91,8. A comma in 24,5 works. Zero diagonal does not divide. This is not an EDID read.
1920×1080 on 24 give 91,8. 2560×1440 on 27 give 108,8. 3840×2160 on 32 give 137,7. Another diagonal at 1920 changes 91,8.
Formula
PPI = sqrt(w² + h²) / diagonal_in. A typed diagonal, not EDID.
How to use
- Type 1920, 1080, and diagonal 24 in.
- Click Calculate. The result is 91,8.
- 2560×1440 on 27 give 108,8. 3840×2160 on 32 give 137,7.
- A typed diagonal, not EDID.
- PX and REM sit on PX ↔ REM Converter.
1920×1080 on 24 in = 91,8
PPI = pixel diagonal / in. 1920×1080 on 24 give 91,8. Not EDID.
- Resolution
- Fields ppi-w and ppi-h. 1920×1080 on 24 leave 91,8. Not EDID.
- PPI
- sqrt(w²+h²) / in. 2560×1440 on 27 gives 108,8. 3840×2160 on 32 gives 137,7.
- diagonal
- Field ppi-diag. 24 in at 1920×1080 leaves 91,8. Not the OSD.
Examples
Example 2
- 2560×1440
- 27 in
108,8
What about 2560×1440 on 27 in? 108,8.
Example 3
- 3840×2160
- 32 in
137,7
What about 3840×2160 on 32 in? 137,7.
Related calculators
Common questions
What PPI at 1920×1080 on 24 in?
91,8. sqrt(1920²+1080²) / 24. A typed diagonal, not EDID.
What about 2560×1440 on 27?
108,8.
What about 3840×2160 on 32?
137,7.
Is 91,8 EDID from a monitor?
No. Three typed fields. The calculator does not read the OSD.
Can the unit be cm?
The select can take another unit. The examples keep in.
Does a comma in 24,5 work?
Yes. Another diagonal at 1920×1080 changes 91,8.
Does 91,8 count Windows scaling?
No. Pixels and inches only. Not system DPI.
Where do I turn px into rem?
On PX ↔ REM Converter. Here 91,8 from 24 in stays.
Does zero diagonal count?
No. The diagonal must be positive. This is not empty EDID.
Knowledge sources
The calculator counts bits, bytes or throughput from your numbers. Below are SI and bit definitions (NIST).
Page updated in 2026.