Converters & calculators
Practical design, storage, print, and kitchen calculations with transparent formulas.
What do you need to do?
PX ↔ REM converter
Convert CSS pixel and rem values using a configurable root font size.
Aspect ratio calculator
Calculate a missing width or height while preserving an image or video ratio.
DPI & PPI calculator
Relate pixel dimensions, print dimensions, and resolution for image output.
Paper size converter
Compare common ISO and North American paper sizes in millimeters, inches, and pixels.
Data size converter
Convert bytes across decimal KB/MB/GB and binary KiB/MiB/GiB units.
Recipe scaler
Scale ingredient quantities from an original serving count to a new yield.
Cooking unit converter
Convert common kitchen volumes and weights between metric and US units.
Your work stays with you
Selected files and entered text stay private while you use these tools.
Tips for larger files
Very large files can need more memory, especially on a phone. Keep originals, start with a small batch, and close other heavy apps or tabs if a tool feels slow.