Date Add/Subtract
Add or subtract days, weeks, months, or years from any date. Find future and past dates instantly. Free, instant, and accurate date arithmetic.
Loading tool...
How to Add or Subtract Dates
Pick Start Date
Select the date you want to calculate from.
Choose Operation
Select add or subtract, then enter the number of days, weeks, months, or years.
Get Result
See the calculated date instantly. Results update as you change any input.
Why Use Our Date Calculator?
Flexible Units
Add or subtract days, weeks, months, and years in any combination.
Instant Results
Results update immediately as you change any input value.
Completely Free
No limits, no signup. Calculate as many dates as you need.
Private & Secure
All calculations happen in your browser. No data is sent anywhere.
Frequently Asked Questions
Does this account for leap years?
Yes! The calculator automatically accounts for leap years and varying month lengths.
Can I calculate business days?
This calculator works with calendar days. For business day calculations, simply count the weeks and adjust manually.
What date range is supported?
You can calculate dates from year 1 to year 9999. The calculator handles all valid date ranges.
How does adding months work?
Adding a month keeps the same day of month where possible. For example, Jan 31 + 1 month = Feb 28 (or 29 in leap years).
Is my data sent anywhere?
No. All calculations happen locally in your browser. No date data is ever sent to any server.