Time & Date

Time & Date Kalkulators

11 interactive tools with transparent guidance and tested shared calculation logic.

Calculate exact elapsed years, months, and days from a birth date.

Find the number of days between two dates.

Count days from today to a target date.

Add calendar days to a date.

Estimate weekdays between two dates, excluding Saturdays and Sundays.

Calculate elapsed minutes between two clock times on the same or following day.

Convert hours and minutes into decimal hours.

Convert decimal hours into hours and minutes.

Count days until the next occurrence of a birthday.

Check whether a year is a Gregorian leap year.

Convert a Unix timestamp in seconds to UTC date and time.