Time & Date Calculators

Calculate age and time between dates

Calculate daily light integral for plants

Calculate dates and time differences

Convert days to years, months, weeks, hours, minutes, and seconds

Calculate the number of days between two dates, with options to exclude weekends.

Find out which day of the week any date falls on

Convert days to months and vice versa with accurate time period conversions

Convert days to weeks and vice versa with our easy-to-use calculator

Convert days to years and vice versa with accurate time period conversions

Calculate time duration in hours between dates and times, or convert days, weeks, months, and years into hours.

Add or subtract time units and convert between different time formats

Calculate work hours, overtime, and earnings from time card entries

Calculate time differences, add or subtract time intervals

Convert time between different time zones and calculate time differences worldwide