Date & Time Calculators
Calculate durations, ages, business days, week numbers, and more — all free, no sign-in required.
Date Duration
→Exact days, weeks, months, and years between two dates.
Time Duration
→Duration between two date-times in hours, minutes, and seconds.
Add / Subtract Date
→Find a future or past date by adding or subtracting any interval.
Business Days
→Count working days between two dates, excluding weekends.
Working Hours
→Total working days and hours for any calendar month.
Age Calculator
→Exact age in years, months, days, hours, and minutes.
Weekday
→Find what day of the week any date falls on.
Week Number
→ISO week number and full week dates for any date.
Unix Timestamp
→Convert Unix timestamps to dates and vice versa.
Leap Year
→Check any year and see the next and previous leap years.
Distance Calculator
→Great-circle distance between any two cities in km and miles.
Dialing Codes
→International calling codes for 51 countries.