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Percentage calculator
Calculate percentages, proportions and changes.
Everyday math
Date calculator
Find the number of calendar days between dates.
Your result
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How to use
- Select the start and end dates.
- Choose to include the start date if both endpoints should count.
- Calculate to see the calendar-day count.
How it works
The result is end date minus start date, plus one when inclusive. It measures calendar dates, not elapsed hours across time zones or daylight-saving changes.
Common questions
Can I count down to an event?
Enter today as the start and your event date as the end.
Are weekends and holidays excluded?
No. All calendar days count. Business-day calculation is not included.
What if both dates are the same?
The result is zero, or one if inclusive. Supported years are 1000–9999.