Calculate the number of hours and minutes between two times
Calculate hours and minutes between two times (automatically handles overnight calculations)
Our hours calculator is a powerful tool designed to help you calculate the number of hours and minutes between two times or dates. Whether you're tracking work hours, planning schedules, or calculating time differences, this calculator provides accurate results instantly.
Our calculator supports both 12-hour and 24-hour time formats to suit your preference:
A 12-hour clock uses the numbers 1-12 with AM (ante meridiem) and PM (post meridiem) designations. AM refers to times from midnight to noon, while PM refers to times from noon to midnight. By convention, 12 AM denotes midnight, while 12 PM denotes noon.
A 24-hour clock uses numbers 0-23, where 00:00 indicates midnight, and a day runs from midnight to midnight over 24 hours. This format is an international standard and eliminates the ambiguity of AM/PM designations. Hours 0-11 correspond to AM hours, while hours 12-23 correspond to PM hours.
Our hours calculator is perfect for various real-world applications:
Understanding how hours accumulate over different time periods can be helpful for planning:
| Time Period | Number of Hours |
|---|---|
| Hours in a day | 24 |
| Hours in a week | 168 |
| Hours in a month (28 days) | 672 |
| Hours in a month (29 days) | 696 |
| Hours in a month (30 days) | 720 |
| Hours in a month (31 days) | 744 |
| Hours in a month (average) | 730.5 |
| Hours in a year (365 days) | 8,760 |
| Hours in a leap year (366 days) | 8,784 |
| Hours in a year (average) | 8,766 |
| Hours in a decade (average) | 87,660 |
| Hours in a century | 876,600 |
An hour is most commonly defined as a period of time equal to 60 minutes, where a minute equals 60 seconds. There are 24 hours in a day. Here's a breakdown of time conversions:
Our calculator displays results in both formats for your convenience:
Decimal hours are particularly useful for payroll calculations and billing, while hours and minutes format is more intuitive for everyday scheduling.
When using the simple hours calculator, if the end time is earlier than the start time, the calculator automatically assumes the end time is on the next day. For example, if you enter a start time of 11:00 PM and an end time of 3:00 AM, it calculates 4 hours.
Yes! Use the "Hours Between Two Dates" calculator to calculate time differences spanning multiple days, weeks, or even months. The calculator will show you the total in days, hours, minutes, and weeks.
The first calculator includes date selection and is best for calculations spanning multiple days. The second calculator is optimized for same-day or overnight calculations and doesn't require date input.
Our calculator is accurate to the minute. It properly accounts for all edge cases including midnight crossings, month boundaries, and leap years.
Yes! The calculator is perfect for payroll. It provides results in decimal format (e.g., 8.50 hours) which is commonly used for payroll systems. However, always verify calculations with official time-keeping systems for legal purposes.
All calculations are performed directly in your browser using JavaScript. We do not store, collect, or transmit any of your time calculation data. Your information remains completely private on your device.
Our hours calculator is fully responsive and works perfectly on all devices including smartphones, tablets, and desktop computers. Calculate hours on the go, anytime, anywhere!