To calculate the duration between two times, subtract the start time from the end time. For example, if you start at 9:00 AM and end at 5:00 PM, the duration is 8 hours. If the end time is earlier than the start time (such as 10:00 PM to 6:00 AM), it means the duration spans overnight — simply add 24 hours to the end time before subtracting. This tool handles overnight calculations automatically, so you don't need to do the math manually.

When the end time is earlier than the start time, it typically indicates an overnight duration. For instance, from 11:00 PM (23:00) to 2:00 AM (02:00), the simple subtraction would give a negative number. Our calculator automatically detects this scenario and adds 24 hours to the end time, yielding the correct duration of 3 hours. You can also manually toggle the "End time is next day" switch for full control.

To convert a duration to decimal hours, divide the minutes by 60 and add the result to the hours. For example, 8 hours and 30 minutes becomes 8.50 decimal hours (because 30 ÷ 60 = 0.5). This format is commonly used for payroll, timesheets, and billing. Our calculator shows the decimal hours automatically, so you can copy it directly into your time-tracking system or invoice.

Here are some common work shift durations in minutes: a standard 8-hour shift equals 480 minutes; a 4-hour half-day is 240 minutes; a 12-hour shift is 720 minutes. Use our calculator to quickly find the total minutes for any custom time range — ideal for tracking part-time hours, freelance projects, or shift scheduling.

Absolutely! This time duration calculator is perfect for work hours tracking. Simply enter your clock-in and clock-out times to see exactly how many hours and minutes you worked. The decimal hours output is especially useful for overtime calculations and payroll processing. For best results, use the preset buttons to quickly fill common shift times, and enable the overnight toggle for night shifts.

For durations spanning multiple days, you can use the overnight toggle as a starting point (adding 24 hours). For longer spans (e.g., 3 days), multiply 24 hours by the number of days and add to the time difference. For example, from Monday 9:00 AM to Thursday 5:00 PM is 3 full days (72 hours) plus 8 hours = 80 hours total. Our tool handles single overnight calculations automatically; for multi-day spans, simply note the additional 24-hour increments.

Elapsed time is the actual duration between two moments (e.g., 8 hours and 30 minutes), while clock time refers to specific points on the clock (e.g., 9:00 AM to 5:30 PM). This calculator measures elapsed time — the total hours and minutes that pass between your start and end clock times. Understanding this distinction is important for accurate time tracking, especially when working with schedules that cross noon, midnight, or multiple days.

• Double-check AM/PM: Ensure you've selected the correct half of the day, especially for times around noon and midnight.
• Use the Now button: Quickly set the current time for real-time duration tracking.
• Leverage presets: Common shift patterns are available as one-click presets to save time.
• Copy decimal hours: Use the copy button next to the decimal result for easy pasting into spreadsheets or timesheet systems.
• Check the visual bar: The percentage bar helps you quickly gauge how much of a 24-hour day your duration represents.