📅 Date & Time
Work out durations, deadlines and dates without the mental arithmetic — add up worked hours, count the days between two dates, find which day of the week a date falls on, and more. Each tool runs instantly in your browser.
Hours Calculator
Add up hours from multiple start/end times for timesheets and payroll.
Days Until Calculator
Count how many days until (or since) any date, plus the weekday.
Day of the Week Calculator
Find which day of the week any date falls on — past or future.
Week Number Calculator
Find the ISO week number for any date — what week of the year is it?
Leap Year Calculator
Check if a year is a leap year, with the next and previous ones.
Age Calculator
Your exact age from your date of birth, plus days to your next birthday.
Date Difference Calculator
Count the days, weeks, months and years between two dates.
Business Days Calculator
Count working days (Mon-Fri) between two dates, minus holidays.
Time Duration Calculator
Work out hours and minutes between a start and end time, minus breaks.
Military Time Converter
Convert between military (24-hour) time and 12-hour AM/PM time.