Image File Size Calculator
Free CalculatorEstimate the raw, uncompressed size of an image from its dimensions and color depth.
100% private
Runs in your browser β no numbers leave your device.
Your numbers
Image width in pixels.
Image height in pixels.
3 = RGB, 4 = RGBA
Uncompressed (MB)
13.76
Raw size in megabytes.
Uncompressed (KB)
14,089
Raw size in kilobytes.
Megapixels
3.61
Width Γ height in millions of pixels.
How it works
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Estimate image size before you export
This calculator gives you the uncompressed size of an image β the raw number of bytes needed to store every pixel. It multiplies width by height to get the pixel count, then multiplies by the bytes per pixel (3 for RGB, 4 for RGBA), and finally converts to kilobytes and megabytes.
The result is the uncompressed size. Real files are almost always smaller: formats like PNG and JPEG compress the data, so a photo that measures 24 MB uncompressed might export as a 2β4 MB JPEG. Use this figure as an upper bound for memory, texture budgets, or bandwidth planning.