📅 Date and Time Calculators

11 free date and time calculators. Days between dates, business days, age, time cards, military time and Unix timestamps.

Days Between Dates CalculatorCount the days between two dates. See the difference in days, weeks, months and years, plus hours, minutes and weekdays.
Business Days CalculatorCount the working days between two dates, excluding weekends and optionally US federal holidays or your own list of holidays.
Date Calculator: Add or Subtract DaysAdd or subtract days, weeks, months, years or business days from a date. Find the date 30, 60, 90 or 180 days from today.
Age CalculatorCalculate exact age in years, months and days from a date of birth. Also shows total months, weeks, days and the next birthday.
Day of the Year CalculatorFind the day number of any date, the days left in the year, the ISO week number, the quarter and whether it is a leap year.
Time Calculator: Add and Subtract TimeAdd and subtract hours, minutes and seconds. Get the total as a duration, in decimal hours, and in minutes and seconds.
Time to Decimal CalculatorConvert hours and minutes to decimal hours for payroll and timesheets, or convert decimal hours back to hours, minutes and seconds.
Time Card CalculatorAdd up hours worked from clock-in and clock-out times with unpaid breaks. Shows daily and weekly totals in hours and decimal hours, with overtime.
Military Time ConverterConvert between military time (24-hour clock) and standard 12-hour AM/PM time. Includes a full military time chart.
Unix Timestamp ConverterConvert a Unix epoch timestamp to a readable UTC date and time, or convert a date and time to a Unix timestamp in seconds and milliseconds.
Time Duration CalculatorCalculate the time between two dates and times in days, hours and minutes. Find how many hours passed between two clock times.

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