Time Duration Calculator

Free time calculator. Add or subtract hours, minutes, and seconds — or find the total duration between a start time and an end time. Use our free calculator now

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Result (h:mm) hesaplanacak
Total Minutes hesaplanacak
Total Seconds hesaplanacak
Decimal Hours hesaplanacak

Calculate Time Duration

This time calculator handles three common time arithmetic tasks: adding time values together, subtracting one time from another, and finding the duration between a start and end time.

Adding Time

Enter multiple time values (hours:minutes:seconds) to find the total. For example:

  • 2h 45m + 1h 30m + 0h 50m = 5h 5m
  • Useful for: tracking billable hours, workout totals, video editing

Subtracting Time

Find the difference between two time values:

  • 4h 15m minus 1h 45m = 2h 30m
  • Useful for: elapsed time, time remaining

Start Time to End Time

Enter a clock start time and end time to get the exact duration. The calculator handles midnight crossovers correctly (for example, 11:00 PM to 3:00 AM = 4 hours).

Time Unit Conversions

UnitEquivalent
1 minute60 seconds
1 hour60 minutes = 3,600 seconds
1 day24 hours = 1,440 minutes
1 week168 hours = 10,080 minutes

Common Uses

  • Freelancers tracking billable hours across projects
  • Athletes logging training session durations
  • Managers calculating shift lengths and overtime
  • Students tracking study time per subject

How to Use This Calculator

Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.

Frequently Asked Questions

QuestionAnswer
How accurate are the results?We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly.
Is this calculator free?Yes, completely free and no registration required.
What should I do for exact figures?For precise information, consult a relevant professional or official authority.
Does it work on mobile devices?Yes, it works seamlessly on all devices and screen sizes.

Important Notes

This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.

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Frequently Asked Questions

Convert everything to minutes, add, then convert back. For example, 2h 45m + 1h 30m = 165 + 90 = 255 minutes = 4h 15m.
Multiply the decimal part by 60. For example, 2.75 hours = 2 hours + (0.75 × 60) = 2 hours 45 minutes.
Useful for tracking work hours, calculating overtime, billing by the hour, sports timing, and scheduling events across time zones.