Convert time span
Multiplicate and divide time
Add multiple time data
Add / subtract days to a date
Time-Ratio - Rule of Three with Time Values
Between two times of day
Convert Time Units
Add and subtract time
A small tool for calculating with time data. Insert two periods of time and choose, if you want them to add or to subtract.
Example: 16 hours, 30 minutes plus 12 hours, 45 minutes adds up to one day, 5 hours and 15 minutes.
One minute has 60 seconds, one hour has 60 minutes or 3600 seconds, one day has 24 hours or 1440 minutes or 86400 seconds. An average year has a length of 365.24 days.
Time and Date Calculators
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German: Uhrzeiten addieren / subtrahieren