Add / Subtract Time Calculator
About Add / Subtract Time Calculator
The add/subtract time calculator starts from a local date and time, applies a duration forward or backward, and returns the resulting date, time, and ISO timestamp.
How to Use
The add/subtract time calculator starts from a local date and time, applies a duration forward or backward, and returns the resulting date, time, and ISO timestamp. Fill in Start date, Start time, Operation, Days, Hours, Minutes, and Seconds, then review the calculated Result date, Result time, ISO timestamp, and Offset.
- Open the calculator : Use Add / Subtract Time Calculator from the Time category.
- Check the inputs : Review the required values and any optional settings.
- Read the formula : Use the formula and notes below to understand how the result is produced.
Common Questions
What does the Add/Subtract Time Calculator estimate?
Add or subtract days, hours, minutes, and seconds from a date and time.
What time settings can change the result?
Date boundaries, local time, daylight-saving changes, and timezone settings can affect the result.
Inputs
- Start date
- Start time
- Operation
- Days
- Hours
- Minutes
- Seconds
Outputs
- Result date
- Result time
- ISO timestamp
- Offset