Time Duration Calculator
Hours
Min
Sec
Hours
Min
Sec
Result
04:15:00
4.25
decimal hours
255.0
total minutes
15300
total seconds
Quick Facts
- •1 hour = 60 minutes = 3,600 seconds
- •0.25 hours = 15 minutes
- •0.5 hours = 30 minutes
- •0.75 hours = 45 minutes
Related Tools
Frequently Asked Questions
How do I add two times together?
Enter Time A and Time B, select 'Add' mode. The result is the total in hh:mm:ss.
Can I subtract times?
Yes. Select 'Subtract' mode. If A < B, the result will be negative.
What if minutes or seconds are over 59?
The calculator automatically carries over. 90 seconds becomes 1 minute 30 seconds.
Can I convert the result to decimal hours?
Yes, the decimal hours output is shown below the main result.
What is 1:30:00 + 2:45:00?
4 hours 15 minutes 0 seconds (4:15:00).