Uncompressed megabytes and a compressed estimate from a ratio.
| Raw MB | – |
| Compressed MB | – |
Use this calculator to size an uncompressed bitmap and a simple compressed sketch. Enter pixel width, pixel height, bits per pixel, and a compression ratio.
Raw MB = width × height × bits / 8 / 1e6. Compressed MB = raw / ratio. 4000×3000 at 24-bit is 36 MB raw; a 10:1 JPEG sketch is 3.6 MB. Real JPEG size depends on content. This is not a print-PPI converter.
Width (px): Pixel width.
Height (px): Pixel height.
Bits/pixel: Bits per pixel, 24 for 8-bit RGB.
Compression: How many times smaller the compressed file is.
Raw MB: Uncompressed size in megabytes.
Compressed MB: Raw size divided by the ratio.
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