Time Calculator
Result = Time1 ± Time2 (carry over at 60 seconds/minutes)2:30:15+1:45:30=3:75:45=4:15:45
Free online tool
Time Calculator
Enter two times and choose an operation.
Instant calculation
Time Calculator
Enter two times and choose an operation.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter first time
Type hours, minutes and seconds for the first time.
- 02
Enter second time
Type hours, minutes and seconds for the second time.
- 03
Choose operation
Select add (0) or subtract (1).
The formula
How this calculation works
Performs addition or subtraction with proper sexagesimal (base-60) carry.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
2:30:15 + 1:45:30?
2:30:15+1:45:30=3:75:45=4:15:454 hours 15 minutes 45 secondsCommon questions
Questions about this calculation
What is the Time Calculator?
The Time Calculator helps you add or subtract two time values in hours, minutes and seconds. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Performs addition or subtraction with proper sexagesimal (base-60) carry.
Can you show an example?
Example: 2:30:15 + 1:45:30? — 4 hours 15 minutes 45 seconds.
Is my data saved when I use the Time Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Time Calculator free to use?
Yes. The Time Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
Continue calculating