Megapixels to MB at PNG RGB 8-bit

1 Image size = 2.1 File size · profile-dependent conversion · context: encoding/quality profile

Direct Answer

1 Image size equals 2.1 File size

This result depends on the selected profile context: encoding/quality profile.

For 2 Image size, this profile returns 4.2 File size.

Converter Calculator

1 Image size (megapixels) =
2.1 File size (MB)

Explanation

PNG RGB 8-bit assumes 2100000 bytes per megapixel. MB = MP x (2100000 / 1,000,000). With input 1 MP, output is 2.1 MB.

From Image size to File size, results depend on the selected encoding/quality profile and stay consistent with that profile across table rows and calculator input.

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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: encoding/quality profile.
  • Consistency rule: keep the same profile in mirror direction to avoid mixing incompatible mappings.

Common Conversion Values

Image size (megapixels)File size (MB)
1 2.1
2 4.2
5 10.5
10 21
12 25.2
16 33.6
24 50.4
36 75.6
48 100.8
64 134.4
100 210
500 1,050
1,000 2,100