Add or Subtract Days Calculator
Add or subtract days from a date and find the resulting day of the week.
Inputs
Use a negative number to subtract days.
Saved Scenarios
— select 2+ to compare| Metric | |
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Result Date
2026-08-09
Day of Week
Sunday
Spark says
What is the Add or Subtract Days Calculator?
This calculator adds (or, with a negative number, subtracts) a number of days from a starting date and shows the resulting date and weekday.
How to use it
- 1 Enter the starting date.
- 2 Enter the number of days to add — use a negative number to go backward.
Worked examples
Frequently asked questions
Can I subtract days instead of adding?
Yes — enter a negative number (e.g. -14) to go back in time from the start date.