Pixel pitch (mm) to PPI at 4K UHD 3840x2160

1 Pixel pitch = 25.4 Pixels per inch · profile-dependent conversion · context: resolution/device profile

Direct Answer

1 Pixel pitch equals 25.4 Pixels per inch

This result depends on the selected profile context: resolution/device profile.

For 5 Pixel pitch, this profile returns 5.08 Pixels per inch.

Converter Calculator

1 Pixel pitch (mm) =
25.4 Pixels per inch (PPI)

Explanation

4K UHD 3840x2160 has a diagonal pixel count of 4405.81434016 px. PPI = 25.4 / pixel_pitch_mm. For reference, input 1 mm/pixel gives 25.4 PPI under this profile.

Pixel pitch to Pixels per inch is profile-bound here: the selected resolution/device profile controls the mapping used by calculator and reference table.

Read more

Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.

Method & Reference (Verified)

  • Method basis: profile-bound mapping; constants depend on the selected profile encoded in the route.
  • Profile reference: resolution/device profile.
  • Consistency rule: keep the same profile in mirror direction to avoid mixing incompatible mappings.

Common Conversion Values

Pixel pitch (mm)Pixels per inch (PPI)
1 25.4
5 5.08
10 2.54
13 1.953846
15 1.693333
24 1.058333
27 0.940741
32 0.79375
43 0.590698
55 0.461818
65 0.390769
100 0.254
200 0.127
300 0.084667