Does the calculator handle 12-hour and 24-hour formats?

Yes, standard time inputs adapt to your system's time format (AM/PM or 24-hour) and compute the duration accurately.

Is Time Duration Calculator — Hours Between Two Times free to use?

Yes, this tool is free to use on Toolfix.info.

Do I need to create an account?

No account is required for basic use of this online tool.

Can I use this tool on mobile?

Yes, the tool is designed to work on desktop, tablet, and mobile browsers.

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Time Duration Calculator — Hours Between Two Times

Q: How do I calculate overtime?

Find the daily duration for each day of the week, sum them up, and calculate the hours that exceed your standard weekly threshold (usually 40 hours).

Q: What is the difference between time duration and date difference?

Time duration measures hours and minutes within a single day or overnight period. Date difference measures days, weeks, and years between calendar dates.

Time Duration Calculator

Calculate the difference between two times in hours, minutes, and seconds

Start Time

→

End Time

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Hours & Minutes

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Decimal Hours

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Total Minutes

💡 Calculation Steps

Time duration calculation results will display here. Supports overnight durations.

How to Use the Time Duration Calculator

Our free time duration calculator helps you find the exact interval between two times of day. Here is how to use it:

Select the Start Time — Enter the time when the event or shift started.
Select the End Time — Enter the ending time.
Click “Calculate Duration” — The tool will calculate the difference in standard hours and minutes, decimal hours, and total minutes.

The calculator automatically handles overnight shifts (e.g., if you start at 9:00 PM and end at 5:00 AM the next day).

Converting Time to Decimal Hours

In payroll and billing software, hours and minutes must be converted to decimal hours to calculate wages accurately. The formula is:

Decimal Hours = Hours + (Minutes ÷ 60)

For example, if you worked 8 hours and 15 minutes:

Decimal Hours = 8 + (15 ÷ 60) = 8 + 0.25 = 8.25 hours

Practical Calculation Examples

Example 1: Freelancer Hourly Billing

You started working at 10:15 AM and finished at 3:45 PM. Duration: 5 hours and 30 minutes, which is 5.50 decimal hours. At a rate of $50/hr, your invoice total is 5.50 × $50 = $275.

Example 2: Night Shift Duration

A security guard starts a shift at 9:30 PM and finishes at 6:00 AM the next day. Since the end time is numerically earlier, the calculator adds 24 hours to the end time to yield a duration of 8 hours and 30 minutes (8.50 decimal hours).

Example 3: Workout Session Track

Gym session start: 5:45 PM. End: 7:10 PM. Total duration: 1 hour and 25 minutes, which is 85 minutes.

Frequently Asked Questions

Does the calculator handle 12-hour (AM/PM) and 24-hour formats?

Yes, standard HTML time inputs support your system’s locale format. You can easily select AM/PM or use 24-hour military time formats, and the browser will pass the correct time to the calculator.

How do I calculate overtime using time duration?

First, calculate the total daily duration using this calculator. Sum the durations across your work week. Any hours exceeding the standard work week threshold (typically 40 hours in the US) are classified as overtime.

What is the difference between time duration and date difference?

Time duration focuses on hours and minutes within a day (or crossing a single overnight period). Date difference calculations span days, weeks, months, or years. If your calculation covers multiple days, use our Date Difference Calculator.