Image File Size Calculator
Enter an image’s pixel size and format to estimate its file size. The uncompressed figure is exact. The compressed ones are rough planning estimates because real size depends on the image content.
How to use it
- Enter width and height.
- Pick a quality level.
- Compare formats and decide what to upload.
Frequently asked questions
Why are compressed sizes only estimates?
Busy, detailed images compress less than smooth ones, so two images of the same pixel size can differ a lot in file size.
Which format is smallest?
Modern formats such as WebP and AVIF usually produce smaller files than JPEG at similar quality, but results vary by image.
See it in practice
Browse prompts with the exact settings and method to recreate them.