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Hours Calculator

Start Time

End Time

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What is online Hours Calculator?

The Hours Calculator is a free online tool that calculates the exact duration between a start time and end time. It provides results in hours, minutes, and seconds, as well as a decimal hours format. The calculator supports 12-hour format with AM/PM selection and automatically handles calculations that span across midnight.

How to use Hours Calculator?

  1. Enter your start time (hours, minutes, seconds) and select AM or PM
  2. Enter your end time (hours, minutes, seconds) and select AM or PM
  3. Click the "Calculate" button
  4. View the duration displayed in both standard format (hours, minutes, seconds) and decimal hours

Use Cases for Hours Calculator

Frequently Asked Questions

Have questions about Hours Calculator? Find answers to the most common queries below.

Enter your start time and end time in the calculator fields, including hours, minutes, seconds, and AM/PM. Click "Calculate" to instantly see the duration in both standard format and decimal hours.
Yes, the calculator automatically detects when the end time is on the next day and accurately calculates the duration across midnight, making it perfect for night shifts.
Decimal hours convert time into a decimal number for easier calculations. For example, 1 hour and 30 minutes equals 1.50 hours in decimal format, which is useful for payroll and billing.
The calculator is precise down to the second, providing accurate results for all time duration calculations including hours, minutes, and seconds.
Yes, you can use this tool to calculate total work hours including overtime. Simply enter your shift start and end times to get the total duration worked.
Yes, this hours calculator is completely free with no registration required. You can use it unlimited times for all your time calculation needs.
Absolutely! Freelancers and contractors can use this tool to calculate billable hours by entering project start and end times. The decimal format is especially useful for invoicing.
Currently, the calculator processes one time period at a time. To calculate multiple periods, simply run the calculation for each period and add the results together.