Free Time Calculator

Useful for adding up durations (e.g. total time across several tasks) or figuring out what time it'll be after a certain duration passes — rollover past 24 hours wraps to the next day count automatically.

Worked Example

Example: 2:45:00 + 1:30:00 = 4:15:00.

Formula / Method

Converts both times to total seconds, adds or subtracts, then converts back to H:M:S format, tracking day rollover.

Worked Example

Example: 2:45:00 + 1:30:00 = 4:15:00.

Formula / Method

Converts both times to total seconds, adds or subtracts, then converts back to H:M:S format, tracking day rollover.