Image size calculator
Estimates raw, uncompressed size. Real files are usually much smaller once JPEG, PNG or WebP compression is applied — use this as an upper bound.
Total pixels
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Raw size
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Est. JPEG (~10:1)
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Est. PNG (~2:1)
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What is Image size calculator?
Before compression is applied, an image's raw file size is just a function of its pixel dimensions and color depth — this calculator estimates that uncompressed size, which is always larger than the final JPEG or PNG you'd actually save.
How to use it
Enter width, height and color depth (8-bit indexed, 24-bit RGB, or 32-bit RGB+alpha). The result shows the raw size plus rough estimates for typical JPEG and PNG compression ratios.
Example
1920 x 1080 at 24-bit -> 6.22 MB raw
~622 KB estimated as JPEG, ~3.1 MB estimated as PNG.