📖 How to Use
Days Between Dates
Select a start and end date to find the number of days, weeks, months, and years between them. Great for calculating durations, project timelines, or countdowns.
Add/Subtract Days
Enter a starting date and the number of days to add or subtract. Perfect for calculating due dates, delivery windows, or future events.
📐 Common Date Calculations
- 90 days from today: Often used for business quarters
- 30 days: Standard billing cycle
- 365 days: One year (366 in leap years)
- Weekdays only: Count business days (excludes weekends)
Quick Reference
- 1 week = 7 days
- 1 fortnight = 14 days
- Average month = ~30.44 days
- 1 quarter = ~91 days
❓ Frequently Asked Questions
Our calculator shows weekdays separately. For a rough estimate, multiply weeks by 5 and adjust for partial weeks. Note: this doesn't account for holidays.
Yes! Our calculator uses actual calendar dates, so leap years (February 29th) are automatically included in the calculation.
Exclusive counting (our default) counts days between dates. Inclusive would add 1 to include both start and end dates. Some legal deadlines use inclusive counting.
We use calendar months (the difference in month values), which varies between 28-31 days. For precise calculations, use the days count.