Online Time Duration Calculator
This time duration calculator instantly calculates time duration between two dates/time including hours, minutes, and seconds with optional time zone support for cross-country comparisons.
How to use the Time Duration Calculator?
Select your start and end date to calculate the time duration between them.
Use the Time fields
If you don't want full dates, you can use the time fields by giving hours, minutes, and seconds to calculate time duration between two times.
- Dates supported: January 1, 0001 to December 31, 9999.
- The Julian calendar is used before September 3, 1752; the Gregorian calendar is used after.
- The 11-day correction in September 1752 (September 3–13) is automatically accounted for in calculations.
- Daylight Saving Time is not considered.
Time zone option
To compare time across countries, choose the times along with their respective locations on which you want to compute the time duration.
- Dates supported: January 1, 0001 to December 31, 9999.
- Julian calendar is not supported, dates before 1582 are interpreted using Gregorian rules.
- Daylight Saving Time (DST) is supported.
Pick a Time format
Select the time format, 12-hour (AM/PM) or 24-hour and then enter the time accordingly for calculation.
Time Standards
UTC (Coordinated Universal Time)
UTC is the global reference standard used to define time zones. Many systems convert local times to UTC internally, then compute the result.
GMT (Greenwich Mean Time)
GMT is a historical reference time standard tied to the Prime Meridian (0° longitude). In practical use, GMT is often treated as the same reference as UTC for everyday timekeeping.
This tool performs time zone calculations based on UTC offsets.
Why do we need Time Duration Calculator Tool?
A time duration calculator tool helps you avoid manual errors when you need accurate results fast.
- Tracking and comparing planned versus actual work hours for project tracking and identifying bottlenecks.
- Using a date duration calculator for time duration calculations in project management and employee shift management.
- Multiplying decimal hours by hourly pay rate or hourly rate for payroll calculations.
- Tracking work hours, shifts, and overtime using a time calculator.
- Planning travel schedules using time zone comparisons.
- Finding the exact difference for events, deadlines, and project timelines.
- Converting the same duration into seconds/minutes/hours for reporting and logs.
- Handling tricky calendar transitions like Julian and Gregorian calendar rules.
FAQs
To calculate time duration between two times, enter a starting time and an end time in the online time duration calculator.
- Choose time format (12-hour AM/PM or 24-hour).
- If the times cross midnight, also select the correct dates so the time duration calculator online can perform the calculation accurately.
- For greater accuracy, the calculation can be performed to the nearest minute.
- Click calculate to get the duration of time in hours, minutes, and seconds. The calculator also provides results in decimal hours, which is perfect for payroll.
A time difference calculator is a time calculator that finds the exact difference between two times or two date-times. A date duration calculator can be used to compare the duration between two chosen times or dates, making it easy to see how much time has elapsed when two time points are compared. Instead of manual counting, it instantly returns the time duration in:
- Hours, minutes, seconds
- Total minutes / total seconds
- Days and weeks, as well as other units (depending on the tool)
This is the same idea as a calculator for time duration, it's built to calculate duration of time quickly and accurately.
Daylight Saving Time (DST) is a system used in some regions where clocks are moved forward during part of the year to shift daylight into the evening.
- In many tools, DST can affect results when you calculate across time zones or during DST transition hours.
- In a time zone-based time duration calculator tool, DST may be supported so the result matches real local clock time changes.
A time zone converter helps you compare or convert time between different regions by applying the correct local offset from UTC. Many calculators combine this with a time duration calculator online so you can:
- Select a From location and a To location
- Enter the same or different date-times
- Get the accurate duration and time difference between the two locations