Date Add/Subtract Calculator
Find the resulting date after adding or subtracting a time period to a starting date.
How to use
Pick start date, choose add/subtract, enter years/months/days.
Formula
Calendar arithmetic on the start date.
Examples
- 2026-01-15 + 3 months → 2026-04-15
Important notes
Handles month-end overflow correctly.
Frequently asked questions
Can I subtract?
Yes, choose Subtract.