What is an Add or Subtract Days Calculator?
An add or subtract days calculator helps you find a date in the future or past by moving forward or backward from a starting date.
Add/Subtract
Add or Subtract Days Calculator
Find the date after adding or subtracting days, weeks, months, or years from a starting date.
Add/Subtract
Select dates and settings to calculate instantly.
Date calculations account for actual calendar length, including leap years and varying month lengths where applicable.
Ready to calculate
Select your dates and inputs to calculate durations, weekdays, future dates, countdowns, and more.
Date Offset Formula
Future Date
New Date = Start Date + Number of Days
Past Date
New Date = Start Date − Number of Days
Examples
30 Days From Today
Input: Start Date = Today, Add = 30 days
Result: Date after 30 days
15 Days Ago
Input: Start Date = Today, Subtract = 15 days
Result: Date 15 days earlier
Frequently Asked Questions
Choose a start date, enter the number of days to add, and the calculator will show the resulting future date.
Yes. Enter the start date and subtract the desired number of days to find a past date.
Yes. Many date calculators also allow adding or subtracting weeks, months, and years.
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