Date Calculator
Add or subtract days, weeks, or months from a date, or calculate the time between two dates with this simple online date calculator.
Calculate Dates
Choose what you want to calculate, enter your dates and duration, and get an instant result.
The Date Calculator helps you find a future or past date by adding or subtracting time from a starting date. You can also use it to calculate the number of days between two dates.
How to Use a Date Calculator
Choose whether you want to add or subtract time from a date, or calculate the difference between two dates. Enter the required dates and duration, then calculate to get your result.
Adding Days to a Date
To find a date a certain number of days from a starting date, enter the starting date, choose days, enter the amount, and select whether to add or subtract the time.
Calculating the Difference Between Two Dates
Use the Days Between Dates option when you want to know how many days separate two dates. This can be useful for project timelines, event planning, contracts, and schedules.
Calendar Days vs. Working Days
This date calculator uses calendar dates. That means Saturdays and Sundays are included. If you need to exclude weekends, use the Working Days Calculator instead.
Common Uses for a Date Calculator
Date calculations are useful for planning project milestones, estimating deadlines, tracking periods, calculating event dates, organizing schedules, and working out time intervals between important dates.
Frequently Asked Questions
How do I calculate a date after a certain number of days?
Enter the starting date, choose days, enter the number of days, and select Add Time. The calculator returns the resulting date.
Can I subtract days from a date?
Yes. Select Subtract Time and enter the number of days, weeks, months, or years you want to subtract.
Can I calculate the number of days between two dates?
Yes. Select Days Between Dates, enter the two dates, and the calculator will show the number of calendar days between them.
Does the Date Calculator exclude weekends?
No. It uses calendar dates, so weekends are included. Use the Working Days Calculator when you need weekdays only.
Can I calculate dates in months or years?
Yes. You can add or subtract months and years as well as days and weeks.
What is the difference between a date calculator and a working days calculator?
A date calculator works with calendar time, while a working days calculator is designed to exclude weekends from the calculation.