Add Days to Date Calculator
Compute a date offset by days.
Add or subtract days from a date instantly. Free date calculator for any number of days.
Calculator Inputs
About Add Days
Compute a date offset by days.
Adds any number of days to a date, handling month/year boundaries.
Where it is used
Due dates, delivery estimates, scheduling.
How to use the Add Days
- Date — enter the value.
- Days (positive add, negative subtract) — enter the value (e.g. 90).
- Calculate — press the Calculate button to see the result instantly above.
Formula
result = date + days (handles month/year rollover).
Examples
90 days from now
date:2026-01-01
days:90
Result: 2026-01-01 +90 days = 2026-04-01
Frequently Asked Questions
- Negative days?
- Yes — negative numbers subtract days.