Timers, to-do lists, habit trackers, invoice builders, world clock, unit converters, number tools, and more — everything you need daily.
Set a countdown for workouts, cooking, presentations
Track elapsed time with laps and split times
Manage tasks with priorities, saved to your browser
Quick scratchpad auto-saved to your browser
Build habits and track daily streaks with progress
Plan your day hour-by-hour with priorities
Convert length, weight, temperature, volume, speed
Convert numbers to English words instantly
Convert written numbers back to digits
Convert between Roman and decimal numbers
Convert between number bases instantly
Convert between fractions and decimals
Simplify and calculate ratios
Find lowest common multiple and greatest common divisor
Calculate n! for any positive integer
Check if a number is prime and find factors
Statistical calculations for any data set
Standard deviation, variance, and range
Generate random numbers within a range
Watch sorting algorithms in action