Time Duration Calculator
Calculate the exact time difference between two times — supports same-day and next-day durations.
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How the Time Duration Calculator Works
The Time Duration Calculator computes the exact difference between two times. It is useful for work hour tracking, study sessions, travel planning, shift calculations, and productivity measurement. Simply select a start time and an end time, and the tool instantly calculates the total hours and minutes between them.
The calculator supports overnight time intervals as well. For example, if a shift starts at 10:00 PM and ends at 6:00 AM the next day, the tool correctly handles the transition past midnight and computes the total duration. It works entirely in your browser with no data collection.
Whether you're calculating employee work hours, gaming sessions, gym workouts, or study durations, this tool provides a simple, accurate and fast way to measure time differences.
Frequently Asked Questions
Does it support next-day time calculation?
Yes. If the end time is earlier than the start time, the calculator assumes it is the next day.
Can I calculate multiple days?
This version supports up to 24 hours. A multi-day version can be added if you need it.
Is my data stored?
No. Everything is calculated locally in your browser.