Hours Calculator
Calculate hours worked or time elapsed between two clock times.
Frequently Asked Questions
How does the hours calculator work?
Enter a start time and an end time in 12-hour (AM/PM) or 24-hour format. The calculator finds the duration between them — how many hours and minutes passed. It handles times that cross midnight (overnight) correctly, as well as times on the same day.
Can I calculate hours worked for payroll?
Yes. This calculator is commonly used for tracking work hours. Enter your clock-in and clock-out times to find the total hours worked in a single shift. For a full work week, add up the results from each day separately.
How do I handle overnight shifts?
If you work from 10 PM to 6 AM the next morning, that's an overnight shift. The calculator correctly handles this by recognizing the end time is on the following day. Simply enter the start time and end time as shown and the correct duration will be calculated.
What is the difference between 12-hour and 24-hour format?
The 12-hour clock uses AM and PM to distinguish morning from afternoon/evening, cycling twice daily (12 AM to 11:59 PM). The 24-hour clock runs from 00:00 (midnight) to 23:59 (11 PM) once per day. The 24-hour format eliminates AM/PM confusion and is standard in healthcare, aviation, and military settings.