Add Days to Date
Add days to a date
Frequently Asked Questions
How do I add days to a date?
Enter a start date and the number of days to add. The calculator accounts for month lengths and leap years automatically. Adding 90 days to January 15, 2025 gives April 15, 2025. Negative numbers subtract days.
Does the calculator account for leap years?
Yes. February has 29 days in leap years (divisible by 4, except centuries unless divisible by 400). Adding 365 days from March 1, 2024 lands on March 1, 2025, but from February 28, 2024 lands on February 27, 2025.
Can I add business days instead of calendar days?
Use the Business Days Calculator for that. This tool adds calendar days including weekends and holidays. For project deadlines that skip weekends, the business days tool is more appropriate.
How do I calculate a date 30 days from now?
Select today's date and enter 30. The result shows the exact date 30 calendar days in the future, including the day of the week. This is useful for payment due dates, return windows, and trial period expirations.
Can I add weeks or months instead of days?
Enter days in multiples: 7 for a week, 14 for two weeks. For months, use the Date Add/Subtract tool which handles month-based calculations correctly (accounting for varying month lengths).