Add Days to Date Calculator
Add or subtract days, weeks, months and years.
Keep or share the finished result
Copy or share after running the tool. Saved tools and settings stay in this browser.
What would you like to do next?
Add time to a date
Use this calculator when you need a date offset, such as 30 days from today, 12 weeks after a start date or 6 months before a renewal. Enter the start date and add positive or negative values for days, weeks, months and years. The result updates instantly.
Planning without calendar counting
Date offsets are easy to miscount by hand, especially across month boundaries. This tool handles the calendar rollover for you and gives a copyable ISO date.
Frequently asked questions
Can I subtract days?
Yes. Enter negative numbers to move backward from the start date.
Can I add months and years too?
Yes. The tool supports days, weeks, months and years together.
What format is the result?
The result is shown as YYYY-MM-DD for easy copying.