Hours Calculator
Duration = End time − Start time17:30−9:00=8 hours 30 minutes
Free online tool
Hours Calculator
Enter a start time and end time to find the hours and minutes between them.
Instant calculation
Hours Calculator
Enter a start time and end time to find the hours and minutes between them.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter start time
Type the starting hour and minute.
- 02
Enter end time
Type the ending hour and minute.
- 03
See duration
Calculate to see the total hours and minutes.
The formula
How this calculation works
Subtract start time from end time. Handles wrap-around past midnight.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
9:00 AM to 5:30 PM — how many hours?
17:30−9:00=8 hours 30 minutes8 hours 30 minutesCommon questions
Questions about this calculation
What is the Hours Calculator?
The Hours Calculator helps you calculate the time difference between two clock times. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Subtract start time from end time. Handles wrap-around past midnight.
Can you show an example?
Example: 9:00 AM to 5:30 PM — how many hours? — 8 hours 30 minutes.
Is my data saved when I use the Hours Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Hours Calculator free to use?
Yes. The Hours Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
Continue calculating