Work out favicon sizes instantly with clear inputs, formula shown and shareable results.
The base set covers the 16, 32 and 48 pixel browser favicons; Apple touch icons add 180 pixels and Android or PWA manifests add 192 and 512 pixels. Serving only a 512 px icon leaves browsers downscaling to 16 px, where hinted detail matters most, so the small sizes are usually redrawn rather than scaled.
Uncompressed size
bytes = sum over sizes of (size x size x 4) for 32-bit RGBA
bytes = sum over sizes of (size x size x 4) for 32-bit RGBA. The base set covers the 16, 32 and 48 pixel browser favicons; Apple touch icons add 180 pixels and Android or PWA manifests add 192 and 512 pixels.
Serving only a 512 px icon leaves browsers downscaling to 16 px, where hinted detail matters most, so the small sizes are usually redrawn rather than scaled.
Enter include apple touch icons, include android and pwa icons. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.