How it works
When adding months, if the day does not exist in the final month (like February 31), we use the last day of that month. Common uses: return windows, warranty periods, notice periods and medication schedules.
Frequently asked questions
Business days only?
This calculator counts calendar days.
See also
Results are estimates for information only and are not financial, legal or medical advice. Rates, taxes and fees vary — confirm with a professional or your lender.