Result will appear here.
Report an image’s actual file size, pixels, megapixels and raw memory — in your browser.
Reports actual file size, dimensions, pixel count, megapixels and raw RGBA memory.
Shows the uploaded size, not an estimated compressed-output size.
If the image will not decode, size and type are still reported.
The file is measured in your browser; nothing is uploaded.
Image File Size Calculator reports the actual size of an uploaded image file in bytes, along with its dimensions, pixel count, megapixels and the raw RGBA memory it occupies once decoded. It reports the real uploaded size — it does not predict a compressed-output size.
Upload any image and the tool reads its file size directly and decodes it to measure width, height and pixel count, then derives megapixels, raw in-memory size and the average stored bytes per pixel.
Nothing is uploaded; the file is measured in your browser and the figures can be downloaded as a text report.
Reports the real uploaded byte size, not a guess at a compressed output.
Shows the raw RGBA memory (width × height × 4) the image uses when decoded.
Gives pixel count, megapixels and stored bytes per pixel.
The file is measured in your browser; nothing is uploaded.
Check exact file sizes when staying under an upload or email limit.
Estimate the decoded RAM a large image will need.
Confirm a camera or export's megapixel count quickly.
Compare stored bytes per pixel across files.
No. It reports the actual size of the file you uploaded, plus the raw RGBA memory it uses when decoded. It does not estimate the size after re-compression at a given quality.
It is width × height × 4 bytes — the uncompressed memory the image occupies once decoded into pixels, which is usually far larger than the stored file.
Yes. It multiplies width by height and divides by one million, so a 4000 × 3000 image is reported as 12 MP.
It still reports the file size and type from the bytes; only the dimension-derived figures are skipped if the browser cannot decode the image.
No. The file is measured and decoded in your browser; nothing is sent to a server.
Tools that pair well with Image File Size Calculator.