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Computer science · Grades 8–11

Uncompressed storage models

This simple model excludes metadata and compression.

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The key idea

This simple model excludes metadata and compression.

size = rows × columns × bytes per cell

Worked examples

A raw image is 39 × 131 pixels with 3 bytes per pixel. Ignoring headers and compression, how many bytes?

39 × 131 × 3 = 15327

15327

A raw image is 32 × 157 pixels with 2 bytes per pixel. Ignoring headers and compression, how many bytes?

32 × 157 × 2 = 10048

10048

Try it yourself

  1. A raw image is 82 × 59 pixels with 3 bytes per pixel. Ignoring headers and compression, how many bytes?

  2. A raw image is 134 × 90 pixels with 4 bytes per pixel. Ignoring headers and compression, how many bytes?

Check your understanding

Answers and marking notes
  1. 14514

    82 × 59 × 3 = 14514

  2. 48240

    134 × 90 × 4 = 48240

Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.