This hours calculator helps you calculate the number of hours between two times, add or subtract hours from a given time, or sum multiple hour values. It is designed for work shifts, study logs, timesheets, and personal schedules.
- Simple mode: Enter a start and end time to find total hours in decimal format, along with hours and minutes. Handles overnight shifts and cross-midnight times automatically.
- Advanced mode: Add or subtract hours from a base time, or enter multiple hour values to get the total instantly.
- Multiple outputs: Results shown in decimal hours, HH:MM format, total minutes, and total seconds.
- Practical uses: Great for employees tracking shifts, students logging study time, fitness routines, travel planning, and daily activity tracking.
How to use: Choose Simple mode to calculate hours between two times. Use Advanced mode to adjust a base time or sum several hour values. The calculator instantly gives clear results in different formats.
Common searches: hours calculator online, calculate hours between two times, add hours calculator, subtract hours calculator, work hours calculator.
Hours Calculator
Calculate total hours between two times, add or subtract hours, or sum multiple hour values. Handles cross-midnight and converts results to hours, minutes, and seconds.
How the hours calculator works
The hours calculator measures the total hours between two times or adds and subtracts hours from a base time. It converts times into minutes, performs the calculation, and then displays results in hours, minutes, and seconds.
Calculating hours between two times
In simple mode, the calculator finds the duration between a start and end time. It works with same-day times and also handles cross-midnight situations automatically.
- Example 1: 9:00 AM to 5:30 PM = 8.5 hours or 8h 30m.
- Example 2: 10:30 PM to 2:15 AM = 3h 45m (cross-midnight shift).
Adding and subtracting hours
In advanced mode, you can add or subtract hours from a given base time. This is useful for shift planning, travel schedules, or workout routines.
- Example 1: Add 2.5 hours to 8:00 AM → 10:30 AM.
- Example 2: Subtract 1.25 hours from 3:00 PM → 1:45 PM.
Summing multiple hour values
You can also enter several hour values to find the total instantly. This helps when calculating weekly timesheets, study hours, or cumulative training sessions.
- Example: 7.5h + 8.25h + 6.75h = 22.5h total.
Common scenarios
The hours calculator is commonly used for work, school, and personal planning. The table below shows real-life examples:
| Scenario | Inputs | Result |
|---|---|---|
| Work shift | 9:00 AM – 5:30 PM | 8h 30m |
| Overnight shift | 10:30 PM – 6:30 AM | 8h 00m |
| Study log | 2h + 1.5h + 3h | 6h 30m |
| Subtract break | 8h – 0.75h | 7h 15m |
Hours Calculator FAQs
You calculate hours between two times by converting both into minutes, subtracting the start time from the end time, and converting back into hours and minutes. For example, 9:00 AM to 5:30 PM equals 8 hours 30 minutes. The hours calculator does this instantly.
Yes. If the end time is earlier than the start time, the calculator assumes the shift crosses midnight. For example, 10:30 PM to 6:30 AM is calculated as 8 hours.
You add hours by converting them into minutes and adding to the base time. For example, adding 2.5 hours to 8:00 AM results in 10:30 AM. The calculator performs this automatically.
Yes. To subtract, the calculator removes the entered hours from the base time. For example, subtracting 1.25 hours from 3:00 PM gives 1:45 PM.
Yes. Decimal hours are supported. For example, 7.5 hours equals 7 hours 30 minutes, and 8.25 hours equals 8 hours 15 minutes. The calculator converts decimals into readable HH:MM format.
Common uses include calculating work shifts, subtracting breaks, summing study sessions, logging training times, and planning daily schedules. It avoids manual conversion and saves time.