Date Calculator
Calculate date differences, add or subtract days, weeks, months, and years from any date
Choose Calculation Mode
Date Difference
Quick Presets
Calculation Results
Total Days
Working Days
Detailed Breakdown
Result Date
Select dates to calculate
Choose your calculation mode and enter the required dates
How to Use the Date Calculator
Professional date calculations made simple
Choose Mode
Select from date difference, add time, or subtract time calculations
Enter Dates
Input your dates using the convenient date picker interface
Get Results
View detailed breakdowns including working days and time periods
Date Calculator FAQ
Does the date calculator include the end date in its count?
Yes. When you count days between two dates, you can choose whether to include the end date. Including it adds one extra day, which matters for contract deadlines and notice periods where the final day counts.
How do I add or subtract weeks or months from a date?
Switch to the add or subtract mode, enter your base date, then choose days, weeks, months, or years. Adding a month from January 31 lands on the last day of February because the calculator follows real calendar arithmetic instead of fixed day counts.
Can it count only business days?
Yes. The difference mode can exclude weekends so you get the number of working days between two dates, which is useful for project timelines, SLA tracking, and delivery estimates.