Time Calculator
Add, subtract, or convert time units effortlessly using our time calculator.
Add or subtract a duration
Time between two date‑times
Convert time units
—
| Metric | Value |
|---|---|
| Total hours | 0 |
| Total minutes | 0 |
| Total seconds | 0 |
| Normalized duration | 0d 0h 0m 0s |
| Wrap across days | No |
Tip: Use subtract to find a start time by removing a duration from a known end time.
| Metric | Value |
|---|---|
| Total hours | 0 |
| Total minutes | 0 |
| Total seconds | 0 |
| Spans whole weeks | 0 weeks + remainder |
Note: This calculator uses your local time zone; no network calls are made.
| Unit | Value |
|---|---|
| Days | 0 |
| Hours | 0 |
| Minutes | 0 |
| Seconds | 0 |
| Milliseconds | 0 |
| Microseconds | 0 |
- Keyboard: Use Tab/Shift+Tab to move, Enter on Calculate.
- Validation: Only non‑negative durations are accepted; times use 24‑hour format.
- Privacy: All math happens in your browser; nothing is sent anywhere.
- Export: Use Download CSV to keep a copy of your results.
What is an Online Time Calculator?
An Online Time Calculator is a tool used to perform calculations involving time, such as adding, subtracting, or converting between different time formats. It can help with tasks like calculating time differences, converting between hours, minutes, and seconds, or adding/subtracting time intervals. It is commonly used for scheduling, time tracking, and solving problems related to time in various fields like project management, event planning, and travel.
How to Use an Online Time Calculator?
Choose the Type of Calculation:
- Decide what kind of calculation you need: adding time, subtracting time, or converting between time units (hours, minutes, seconds).
Enter Time Values:
- Input the start time or the time intervals (e.g., hours, minutes, and seconds) for addition or subtraction.
Perform the Calculation:
- For addition or subtraction, enter the second time interval (e.g., adding 2 hours 30 minutes to 5:15).
- For conversions, input the value you wish to convert (e.g., convert 3 hours 45 minutes to minutes).
Click “Calculate”:
- After entering the values, click the "Calculate" button to get the result.
Review the Results:
- The calculator will display the result in the desired format, whether it's the new time after adding/subtracting, or the converted time in different units.
Frequently Asked Questions-
Can I use the time calculator to calculate the time difference between two dates?
Yes, many online time calculators can compute the difference between two dates and give the result in days, hours, minutes, or seconds.How do I calculate the time difference in hours and minutes?
Simply input the two times (start and end) in hours and minutes, and the calculator will subtract the start time from the end time to give you the difference.Can I calculate the total time worked by adding multiple time intervals?
Yes, you can add multiple time intervals together to calculate the total time worked. For example, if you worked 3 hours 15 minutes, 2 hours 45 minutes, and 4 hours 30 minutes, the calculator will give you the total.How does the time calculator handle overflows (e.g., minutes over 60)?
Most online time calculators automatically handle overflows by converting excess minutes to hours or excess hours to days. For instance, 75 minutes will be converted to 1 hour and 15 minutes.Can I convert between different units of time, like converting hours to seconds?
Yes, many time calculators allow you to convert between different units of time. For example, you can easily convert hours to minutes or seconds using the calculator.
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