Date Calculator - Add or Subtract from a Date
Add or subtract days from a date in just a few clicks
With our date calculator, you can add or subtract days, weeks, months, or years from any date of your choice. Simply enter the start date, specify the number to add or subtract, and the result appears instantly on screen. You can also combine multiple units together, for example adding 2 months and 15 days in a single calculation.
It's extremely useful when you need to calculate a due date or a deadline, as calendar calculations quickly become tedious. The date calculator is commonly used in administrative and legal fields, particularly for calculating statutory deadlines or contract expiration dates.
How does the date calculator work?
The online date calculator runs directly in your browser. You enter a start date, choose the 'add' or 'subtract' option, then specify the number of days, weeks, months, or years. The tool automatically accounts for months of different lengths and leap years. The result gives you the exact date obtained after the operation.
No plugins or installation required. You can change the values at any time, and the result updates instantly.
When would you need to calculate a date online?
There are many reasons you might want to use an online date calculator. For instance, you may need to find the exact date 90 days from now to prepare for an administrative deadline, or calculate a delivery date based on a lead time given in weeks. Date calculators also let you determine the end of a trial period, find a past date by subtracting a number of days, or plan an event at a specific date in the future.
Healthcare professionals also use it to calculate follow-up dates, and project managers to set milestones based on deadlines in business days.
Reliable, error-free date calculations
The great advantage of our date calculator is that it handles all the intricacies of the calendar for you. No more counting days on the calendar wondering whether the month has 28, 30, or 31 days.
No need to do the maths by hand – which can quickly lead to errors when spanning several months or years – our tool takes care of it automatically. What's more, it's completely free and accessible from any platform: mobile, tablet, or desktop. It makes it far simpler to calculate a past or future date, whether for an administrative procedure, a professional project, or any other situation requiring a precise date.
Ideal for calculating a deadline or obtaining a precise date from a number of days, with no room for error.