Time Duration Calculator
Fill in the values and the answer updates as you type.
How the Time Duration Calculator works
If the end time is earlier than the start time, it is treated as the next day.
Inputs and results
The Time Duration Calculator takes 2 inputs and gives 2 results.
What you enter
- Start time — starts at 09:00.
- End time — starts at 17:30.
What you get
- Duration
- Decimal hours
Example: Time Duration Calculator with the starting values
With start time 09:00 and end time 17:30, the calculator returns:
| Duration | 8 h 30 min |
|---|---|
| Decimal hours | 8.5 |
Change any value above and the results update straight away.
Time Duration Calculator FAQ
How do I use the Time Duration Calculator?
Enter start time and end time in the fields, then read duration and decimal hours in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Time Duration Calculator calculate?
Hours and minutes between two times. It returns duration and decimal hours from the 2 values you provide.
What values does the Time Duration Calculator start with?
It opens with start time 09:00 and end time 17:30 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Time Duration Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Time Duration Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.