Date Calculator
Calculate the difference between dates, add or subtract days, and find business days quickly with this free online date calculator.
Calculate Dates Easily
Choose a calculation below and get an instant result.
Total elapsed time between the selected dates
Add Days to a Date
Subtract Days from a Date
Business days between the selected dates
Free Date Calculator
The STAAMS Date Calculator is a free online tool for working with calendar dates. It can calculate the number of days between two dates, add or subtract a specific number of days, and calculate business days between dates.
Whether you are planning a project, checking a deadline, calculating a duration, preparing a schedule, or simply finding out how many days are between two dates, this tool provides a fast and easy calculation.
What Can You Calculate?
Days Between Two Dates
Enter a start date and an end date to find the exact number of elapsed calendar days between them. You can also enable inclusive counting when you want both the starting and ending dates included.
Add Days to a Date
Choose a starting date and enter the number of days to add. The calculator will determine the resulting calendar date.
Subtract Days from a Date
Enter a date and the number of days to subtract to quickly find an earlier date.
Business Days Calculator
Calculate weekdays between two dates. Saturdays and Sundays are excluded from the business-day calculation.
How to Use the Date Calculator
- Select the type of calculation you need.
- Enter the required dates.
- Enter the number of days when adding or subtracting days.
- Click the calculation button.
- View the result instantly.
Date Calculation Examples
Days between dates: If a project starts on January 1 and ends on January 31, the elapsed difference is 30 days.
Adding days: Adding 30 days to a starting date gives the calendar date exactly 30 days later.
Subtracting days: Subtracting 30 days gives the calendar date exactly 30 days earlier.
Business days: Weekdays are counted while Saturdays and Sundays are excluded.