All tools
32 free tools, no sign-up
Everything runs in your browser — nothing you type is sent to a server. Every result is worked out from standard calendar and time-zone rules, clearly labelled as such.
Time zone tools
Convert between zones, see the time anywhere, and check daylight saving.
Time Zone Converter
Convert any time between two time zones
World Clock
The current time in cities around the world
UTC Converter
Convert local time to UTC and back
Daylight Saving Time Checker
Is daylight saving in effect, and when does it change?
Time Zone List
Every time zone, with its current UTC offset
Time in Any City
What time is it right now in any city?
Meeting & work planning
Find meeting times that work, add up working hours, and plan shifts and flights.
Meeting Planner
Find a meeting time that works across time zones
Meeting Time Finder
Find the hours when everyone is awake and working
Working Hours Calculator
Add up working hours across days, shifts and breaks
Overtime Calculator
Work out overtime hours and pay
Shift Planner
Plan shifts across days and nights
Flight Time Calculator
Flight duration and arrival time across time zones
Age & date calculators
Exact age, days between dates, week numbers, leap years and the day of the week.
Age Calculator
Your exact age — years, months, days and hours
Date Calculator
What date is it a number of days from now?
Days Between Dates Calculator
Count the days, weeks and months between two dates
Date Difference in Months
The difference between two dates in months and days
Add & Subtract Time Calculator
Add or subtract hours and minutes from any time
Day of the Week Calculator
What day of the week was — or will be — any date?
Week Number Finder
Find the ISO week number for any date
Leap Year Checker
Is this year a leap year?
Countdowns
Count down to birthdays, anniversaries, holidays, deadlines and retirement.
Countdown Timer
Count down to any date and time, live
Countdown Creator
Create a countdown to any event
Birthday Countdown
Count down to your next birthday
Anniversary Calculator
How long since your anniversary — and when is the next?
Days Until Calculator
How many days until any date?
Retirement Countdown
Count down to retirement
Converters & differences
Business days, time differences, time units, Unix timestamps and Julian dates.
Business Days Calculator
Count working days between two dates
Time Difference Calculator
The exact difference between two times
Hours Between Times Calculator
How many hours and minutes between two times?
Time Unit Converter
Convert seconds, minutes, hours, days and years
Unix Timestamp Converter
Convert Unix timestamps to dates, and back
Julian Date Converter
Convert between calendar dates and Julian day numbers