Time Calculator
Add, subtract, and convert time units with precision
Hours
Minutes
Seconds
Hours
Minutes
Seconds
Ready to Calculate
Select a mode and enter time values to get started
Time Arithmetic
Time calculations are essential in many aspects of daily life, from tracking work hours to planning projects. Unlike decimal numbers, time uses a base-60 system (sexagesimal) where 60 seconds make a minute and 60 minutes make an hour. This calculator handles all the conversions automatically.
Common Applications
Time calculators are used for timesheet calculations, project time tracking, cooking and baking recipes, exercise duration tracking, travel time planning, meeting duration calculations, and many other practical purposes where precise time measurements matter.
Time Zones and Daylight Saving
Note that this calculator performs pure time arithmetic and doesn't account for time zone differences or daylight saving time changes. For calculations involving specific dates and time zones, you may need additional considerations.
Decimal Hours
In some contexts, especially payroll and billing, time is expressed as decimal hours (e.g., 2.5 hours instead of 2 hours 30 minutes). This calculator shows both formats, making it easy to convert between standard time notation and decimal hours for different purposes.