Date & Time
World Clock
See the current time across major cities and time zones.
Countdown Timer
Set a countdown timer with start, pause and reset.
Stopwatch
A precise stopwatch with lap times.
Age Calculator
Calculate your exact age in years, months and days.
Date Difference Calculator
Find the difference between two dates in years, months and days.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Pomodoro Timer
Focus with 25-minute work sessions and 5-minute breaks.
Days Between Dates
Count the number of days between two dates.
Week Number Calculator
Find the ISO 8601 week number for any date.
Leap Year Checker
Check if a year is a leap year and list upcoming ones.
Time Duration Calculator
Add or subtract two durations in hours, minutes and seconds.
Sleep Calculator
Find the best bedtime or wake-up time by sleep cycles.
Zodiac Sign Finder
Find your Western and Chinese zodiac signs.
Day of the Week Finder
Find what day of the week any date falls on.
Date Add / Subtract
Add or subtract days, weeks, months and years.
Business Days Calculator
Count working days between two dates.
Countdown to Date
Live countdown to any future date and time.
Military Time Converter
Convert between 12-hour AM/PM time and 24-hour military time, live and two-way.
Decimal Hours Converter
Convert HH:MM time to decimal hours and back, ideal for timesheets and payroll.
Day of Year Calculator
Find which day of the year a date falls on, days remaining, and percent of the year elapsed.
Moon Phase Calculator
Find the approximate moon phase, illumination percentage and moon age for any date.
Date Format Converter
Reformat any date into ISO, US, EU, long, RFC or a custom token pattern.