Web Calculator

Convert px to rem or em in CSS. rem is preferred for responsive design, while px is used f...

Convert data sizes between B, KB, MB, GB, and TB using base 1024.

Enter width and height in pixels to get the aspect ratio (e.g. 16:9) reduced by the greate...

Convert between HEX codes and RGB values — useful for CSS color work.

Enter pixel dimensions and DPI to calculate the physical print size in inches.

Enter file size and internet speed to estimate the download time.