Tiny, focused tools that load fast and get out of your way.
Calculate age from birthdate.
Days between two dates.
Body Mass Index from height and weight.
Tip + split the bill.
Increase/decrease from A to B.
Monthly payment for a loan.
Future value with compounding.
Resize & simplify ratios.
Pixels per inch from size and pixels.
Convert Unix time and dates.
Celsius, Fahrenheit, Kelvin.
Bin/Oct/Dec/Hex converter.