Math & Calculators
Date Calculator
Calculate the number of days between two dates or add/subtract days from a date.
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What is Date Calculator?
A date calculator lets you add or subtract days, weeks, months, or years from any date, or find the exact duration between two dates. It's invaluable for planning deadlines, counting down to events, or figuring out contract periods.
How to Use
- Choose whether to find the difference between dates or add/subtract from a date
- Enter your start date and end date, or a date with a duration to add
- Review the result showing the difference in multiple units
- Use the result for scheduling, planning, or record-keeping
Frequently Asked Questions
- How do I count business days between two dates?
- Select the business days option to exclude weekends. Some versions also let you exclude public holidays.
- Can I add weeks and days at the same time?
- Yes, enter the total duration in any combination of years, months, weeks, and days to get the target date.
- Does it handle month-end edge cases?
- Yes. Adding one month to January 31 correctly returns February 28 (or 29 in a leap year) instead of an invalid date.