Web & Dev Calculators
Tools for web developers and designers
10 free calculators in this category — no sign-up required.
PX to REM
Convert pixels to REM units
Hex to RGB
Convert hex colors to RGB
RGB to Hex
Convert RGB to hex color codes
Aspect Ratio
Calculate aspect ratio dimensions
Screen Resolution
Calculate PPI and screen density
Download Time
Estimate download time for files
File Size
Convert between file size units
Bandwidth Calculator
Calculate data transfer rate
Base64 Encoder
Encode and decode base64 strings
Hash Calculator
Calculate MD5, SHA-1, SHA-256 hashes