How Does This Date Calculator Work?
Use this Date Calculator to find the number of days between two dates, calculate business days, or add and subtract days, weeks, months, and years from a starting date.
Calculate Days Between Two Dates
Enter a start date and an end date. The calculator shows the exact calendar-day difference, a weeks-and-days breakdown, and equivalent time units. You can include the end date when needed.
Add or Subtract Days, Weeks, Months, or Years
Choose a starting date, enter an amount, select Days, Weeks, Months, or Years, and choose Add or Subtract. The calculator returns the resulting date and weekday. Month-end dates are handled safely.
Business Days Calculator — Exclude Weekends & Holidays
Business days normally mean Monday through Friday. Saturdays and Sundays are excluded, and you can also exclude public holidays using a preset or your own holiday dates.
Frequently Asked Questions
How many days are between two dates?
Enter the start and end dates to calculate their calendar-day difference. You can optionally include the end date.
How do I calculate a date 30 days from today?
Use Add / Subtract mode, enter today's date as the starting date, choose 30 Days, and select Add.
How many business days are between two dates?
Use Business Days mode. Saturdays and Sundays are excluded, and you can enter additional holiday dates to exclude.
Does the calculator include public holidays?
You can choose a holiday preset or enter custom holiday dates. Public holidays vary by country, region, and year.
Can I add or subtract months and years?
Yes. Add / Subtract mode supports days, weeks, months, and years, with end-of-month dates handled safely.