Date & time
Date & Time Calculators
Calculate date differences, deadlines, working days, ages, time durations and live countdowns with clear calendar rules.
Days Between Dates CalculatorCount calendar days, weekdays, weekends and full weeks between two dates.
Weeks Between Dates CalculatorConvert a date interval into full weeks, remaining days and decimal weeks.
Months Between Dates CalculatorMeasure complete calendar months and leftover days.
Days From Today CalculatorFind a future or past date from today.
Date CalculatorAdd or subtract days, weeks, months or years from any date.
Deadline CalculatorCalculate due dates using calendar days or working days.
Business Days CalculatorCount working days between dates using common workweeks.
Working Days From TodayMove forward or backward using working days only.
Time Duration CalculatorFind elapsed hours and minutes between two times.
Time Addition CalculatorAdd or subtract hours and minutes.
Age CalculatorCalculate exact age from a birth date.
Countdown TimerCreate a live countdown to an exact date and time.
How to choose the right calculator
Date calculations can differ because of inclusive counting, month lengths, leap years and workweek assumptions. Each tool states the rule it uses near the result so you can verify the answer.
Each calculator opens directly to the tool. Supporting explanation comes after the result so the page remains useful first and informative second.