Time Calculator

About the Time Calculator

The time calculator allows you to add or subtract time values in days, hours, minutes, or seconds from a starting date and time. It can also calculate the duration between two dates and times, showing the result in multiple units.

How to Add or Subtract Time

To add or subtract time from a date:

1. Enter the starting date and time
2. Enter the days, hours, minutes, and seconds you want to add or subtract
3. Select whether to add or subtract the time
4. Click "Calculate" to see the result

How to Calculate Time Duration

To calculate the duration between two dates and times:

1. Enter the "From" date and time
2. Enter the "To" date and time
3. Click "Calculate Duration" to see the time difference

Time Calculation Methods

The calculator uses JavaScript's Date object to perform accurate date and time calculations, accounting for varying month lengths and leap years. When adding or subtracting time, it converts all time units to milliseconds for precise arithmetic.

Common Uses

This calculator is useful for:

• Calculating deadlines by adding days to a start date
• Determining expiration dates by adding months to a purchase date
• Finding out how much time has passed between two events
• Scheduling events by subtracting time from a target date
• Tracking project durations and time spent on tasks