Uncompressed image size calculator

How to use the Uncompressed image size calculator

What does the Uncompressed image size calculator do?

Estimate raw bitmap memory from dimensions and bit depth; It applies this page-specific rule: raw bitmap bytes equal width × height × bits per pixel divided by eight.

Which inputs does this calculator use?

To estimate raw bitmap memory from dimensions and bit depth, enter Width (px), Height (px), Bits per pixel; keep every value in the same example; select Calculate when the values are ready; Start with a familiar case covered by this rule - The result uses decimal megabytes and assumes tightly packed active pixels - so the expected result can confirm the settings.

How should the calculator result be read?

For a result intended to estimate raw bitmap memory from dimensions and bit depth, the result uses decimal megabytes and assumes tightly packed active pixels; read bits per pixel together with the original width (px) rather than as an isolated answer, and confirm that its units or structure match the intended use.

What calculation does this use?

When the goal is to estimate raw bitmap memory from dimensions and bit depth, raw bitmap bytes equal width × height × bits per pixel divided by eight.

Why might a real result differ?

When using the page to estimate raw bitmap memory from dimensions and bit depth, headers, row padding, layers, color profiles, previews, and compression are excluded.

Limits and accuracy

When using this calculator to estimate raw bitmap memory from dimensions and bit depth, headers, row padding, layers, color profiles, previews, and compression are excluded; the result is an estimate unless every source value is known; codecs, metadata, overhead, and variable bitrates can change an actual file; keep width (px) until the output has been checked in its intended destination. For a repeatable check when you need to estimate raw bitmap memory from dimensions and bit depth, record Width (px) alongside the final output and selected options.