Find the number of hours and minutes between two times. Supports same-day calculations and cross-date calculations with AM/PM or 24-hour format.
Find hours and minutes between a start and end time (same day)
The Hours Calculator computes the number of hours and minutes between two points in time. It supports both 12-hour (AM/PM) and 24-hour clock formats.
The Same Day mode is ideal for calculating work shifts or daily schedules. If the end time is earlier than the start time, the calculator assumes the period crosses midnight and adds 24 hours accordingly.
The Cross Date mode handles multi-day spans — useful for calculating total hours worked across multiple days, or time elapsed between two specific moments.
| Period | Hours |
|---|---|
| Hours in a day | 24 |
| Hours in a week | 168 |
| Hours in a month (28-day) | 672 |
| Hours in a month (30-day) | 720 |
| Hours in a month (31-day) | 744 |
| Hours in a month (avg) | 730.5 |
| Hours in a year (365-day) | 8,760 |
| Hours in a year (366-day) | 8,784 |
| Hours in a year (avg) | 8,766 |
| Hours in a decade (avg) | 87,660 |
| Hours in a century | 876,600 |
H:MM or HH:MMFrequently Asked Questions