Date & Time calculators
Age, countdowns, durations and working-day counts.
Age Calculator
Free Age Calculator. Find your exact age in years, months, days, hours, and countdown to your next birthday quickly and accurately.
Date Difference Calculator
Free Date Difference Calculator. Calculate the exact difference between two dates in days, weeks, months, and years quickly and accurately.
Countdown Calculator
Free Countdown Calculator. Count down to any future date and time with accurate days, hours, minutes, and seconds remaining.
Time Duration Calculator
Free Time Duration Calculator. Calculate the time difference between two times, including hours, minutes, and overnight durations.
Working Days Calculator
Free Business Days Calculator to calculate the number of working days between two dates, excluding weekends, quickly and accurately.
Add or Subtract Days Calculator
Free Add or Subtract Days Calculator. Find the exact date a set number of days before or after any starting date.
Week Number Calculator
Free Week Number Calculator to find the ISO week number, day of the week, and day of the year for any date.