Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from a date.
About This Tool
Free date add/subtract calculator online — add or subtract any number of days, weeks, months, or years from a starting date to find the resulting date. Pick a start date, choose to add or subtract, enter the amount and unit, and get the exact resulting calendar date immediately. Commonly used to calculate due dates (e.g., "30 days from today"), plan delivery or shipping estimates, work out lease or subscription renewal dates, calculate deadlines from a contract signing date, or figure out a date a certain number of years in the past or future. The calculation correctly handles month-length differences and leap years, so "add 1 month to Jan 31" resolves sensibly.
How to Use
- 1
Pick the start date
Select the date you want to calculate from — defaults to today.
- 2
Choose add or subtract
Toggle whether you want to move forward or backward in time.
- 3
Enter the amount and unit
Type a number and choose days, weeks, months, or years.
- 4
Read the result
See the resulting calendar date and day of the week instantly.