Time Duration Calculator
Add or subtract time, calculate intervals, and convert between time zones
Time Calculation
Quick Reference
How to Calculate Time Duration Manually
Calculating the time between two points in time involves subtracting the start time from the end time. Here is the step-by-step process:
- Subtract Seconds: If the end seconds are less than start seconds, borrow 60 from the minutes.
- Subtract Minutes: If the end minutes are less than start minutes, borrow 60 from the hours.
- Subtract Hours: Subtract the remaining start hours from end hours.
- Am/Pm Adjustment: If crossing midnight, add 12 or 24 hours to the end time to keep the result positive.
Frequently Asked Questions
How many minutes are in a year?
There are approximately 525,600 minutes in a non-leap year (365 days × 24 hours × 60 minutes). For a leap year, it is 527,040 minutes.
How do I calculate work hours?
Input your "Start Time" and "End Time" in the duration calculator above. Our tool will automatically calculate the total hours and minutes worked between those times.
How do I convert between time zones?
Select the "Time Zone Converter" option in the calculator dropdown. Enter your local time and select both the source and destination time zones to see the converted time.
What is the difference between UTC and GMT?
UTC is a time standard, while GMT is a time zone. For most practical purposes, they are identical, but UTC is more precise and used for scientific and technical purposes.