Add Days to Date Calculator
Add a number of days to a date to find the resulting calendar date and day of the week.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter a start date and a number of days to add, and this calculator finds the resulting date.
Your result
2026-10-12
Result date
Day of the weekMonday
AI explanation
Formula
Result date = start date + number of daysWorked example
30 days after 2026-09-12
| Field | Value |
|---|---|
| Start date | 12-09-2026 |
| Number of days to add | 30 |
| Result date | 2026-10-12 |
| Day of the week | Monday |
Assumptions
- Dates are treated as calendar dates with no time-of-day or timezone component.
Frequently asked questions
How do I find a date a certain number of days from today?
Set the start date to today, enter the number of days, and the result shows the exact calendar date and day of the week.
Need to subtract days instead?
Use the Subtract Days from Date Calculator for that direction, or the general Date Calculator, which supports both directions with a single toggle.
Does this handle month and year boundaries correctly?
Yes — the underlying arithmetic correctly rolls over month lengths and leap years.