This time calculator helps you add, subtract, and sum multiple time values in hours, minutes, and seconds. It displays results in HH:MM:SS format along with total hours, minutes, and seconds for easy understanding.
- Simple mode: Enter two times and choose add or subtract to calculate results instantly.
- Advanced mode: Add multiple time values such as work sessions, study periods, or travel times.
- Multiple outputs: Results shown in HH:MM:SS, total hours, total minutes, and total seconds.
- User-friendly: Clean interface for quick time math without manual conversion.
- Practical uses: Ideal for summing work logs, exercise times, or tracking daily activities.
How to use: Choose Simple mode to add or subtract a single set of hours, minutes, and seconds. Use Advanced mode to enter multiple time values and get the total instantly.
Common searches: time calculator online, add hours and minutes calculator, subtract time calculator, sum of multiple times tool, HH:MM:SS calculator.
Time Calculator
Add and subtract hours, minutes, and seconds, or sum multiple time values to get total time in HH:MM:SS format.
How the time calculator works
The time calculator adds, subtracts, or sums multiple time values entered in hours, minutes, and seconds. It converts everything into seconds for accuracy, performs the calculation, and then displays the result in HH:MM:SS format along with total hours, minutes, and seconds.
Adding and subtracting time
In simple mode, you can quickly add or subtract two time values. This is useful when calculating total duration of activities or finding out the remaining time in a schedule.
- Example 1 (Addition): 2h 45m + 1h 30m = 4h 15m.
- Example 2 (Subtraction): 8h 00m − 2h 15m = 5h 45m.
Summing multiple time values
In advanced mode, the calculator can add several time entries together. This is helpful for summing work shifts, study sessions, workouts, or travel segments.
- Example: 1h 20m + 2h 10m + 45m = 4h 15m.
Common scenarios
Time calculators are commonly used to track productivity, exercise, or schedules. The table below shows some practical use cases:
| Scenario | Inputs | Result |
|---|---|---|
| Work log | 3h 30m + 4h 15m | 7h 45m |
| Exercise | 45m + 1h 20m | 2h 05m |
| Study sessions | 1h 10m + 50m + 2h | 4h 00m |
| Subtract break | 8h − 1h 15m | 6h 45m |
Time Calculator FAQs
You add hours and minutes by converting them into a single format and summing them. For example, 2 hours 45 minutes plus 1 hour 30 minutes equals 4 hours 15 minutes. The time calculator does this automatically.
Yes. To subtract, convert both times into total seconds, subtract the smaller value from the larger, and then convert back into hours, minutes, and seconds. The calculator instantly performs this for you.
HH:MM:SS stands for hours, minutes, and seconds. For example, 02:45:30 means 2 hours, 45 minutes, and 30 seconds. The time calculator uses this standard format for clarity.
Yes. In advanced mode, you can enter several time values and the calculator will sum them all. For example, 1h 20m + 2h 10m + 45m equals 4h 15m.
Common uses include adding work shifts, summing study sessions, tracking exercise, planning travel time, and subtracting breaks from total hours. It is a fast way to manage schedules.
Yes. You can enter hours, minutes, and seconds, and the calculator will provide results in HH:MM:SS format along with total hours, minutes, and seconds.