Add Days to Date
Use negative numbers to subtract days
Result
April 17, 2026
Friday
Quick Facts
- •30 days ≈ 1 month (but months vary: 28–31 days)
- •90 days ≈ 3 months (a quarter)
- •365 days = 1 year (366 in leap years)
- •Use negative numbers to count backwards
Related Tools
Frequently Asked Questions
Can I subtract days?
Yes. Enter a negative number of days to go backwards.
Does this handle leap years?
Yes. Adding days across February 29 in leap years is handled correctly.
What if I add 365 days?
You'll get the same date next year — unless you cross a leap day, in which case it may shift by one day.
Can I use this for delivery estimates?
Yes. Enter your ship date and add the estimated transit days.
What is 30 days from today?
Use this calculator with today's date and 30 days to find out.