Date Calculator

Calculate date differences, add or subtract time from dates, and perform date arithmetic. Perfect for planning, scheduling, and date-related calculations.

Calculator

Calculation Type

Date DifferenceDate Arithmetic

Calculate Date Difference

Start Date

End Date

How to Use

Date Difference: Select start and end dates to calculate the time between them
Date Arithmetic: Choose a base date and add/subtract days, weeks, months, or years
Results show detailed breakdowns including business days and day-of-week information
Use the share buttons to save or share your calculations

Frequently Asked Questions

How do I calculate the difference between two dates?

Enter the start date and end date, then select 'Calculate Date Difference' to find the number of days, weeks, months, and years between them. The calculator automatically handles leap years and different month lengths.

How do I add or subtract time from a date?

Enter a start date, then specify the amount of time to add or subtract (days, weeks, months, or years). Choose whether to add or subtract, and the calculator will show you the resulting date.

What formats does the date calculator support?

The calculator supports standard date formats including MM/DD/YYYY, DD/MM/YYYY, and YYYY-MM-DD. You can also use natural language inputs like 'today', 'yesterday', or 'next week'.

How accurate is the date calculation?

The calculator is highly accurate and automatically accounts for leap years, different month lengths, and daylight saving time changes. It follows standard calendar rules and handles edge cases correctly.