Days Between Calculator
Calculate the exact number of days between any two dates. Perfect for tracking project durations, calculating age, planning events, or determining time periods. Order doesn't matter - the calculator automatically finds the difference.
Calculate Days Between Dates
How to Use
- Enter first date: Select or type the first date in the date picker.
- Enter second date: Select or type the second date in the date picker.
- View results: The calculator automatically updates to show the number of days between the dates.
- Order doesn't matter: You can enter the dates in any order - the calculator finds the difference automatically.
Common Use Cases
📊 Project Duration
Calculate how long a project or task took from start to finish.
🎂 Age Calculation
Find out how many days old someone is or days until their birthday.
📅 Event Planning
Determine how many days until an important event or deadline.
📝 Contract Terms
Calculate contract length or time remaining on agreements.
✈️ Travel Planning
Find out how long until your trip or how long you've been away.
💼 Work History
Calculate tenure at a job or time between employment dates.
What You Get
- Total days: Exact number of days between the two dates.
- Weeks breakdown: Number of complete weeks plus remaining days.
- Approximate months: Based on average month length of 30.44 days.
- Approximate years: Based on average year length of 365.25 days.
- Hours: Total number of hours (days × 24).
- Detailed breakdown: Years, months, weeks, and days combined.
- Date information: Shows which date is earlier and the day of week for each date.
Examples
Example 1: One Month
Dates: February 22, 2026 to March 24, 2026
Result: 30 days (4 weeks + 2 days)
Example 2: One Year
Dates: January 1, 2025 to January 1, 2026
Result: 365 days (52 weeks + 1 day, 1 year)
Example 3: Project Duration
Dates: March 1, 2026 to August 15, 2026
Result: 167 days (23 weeks + 6 days, 5.5 months)
Tips & Information
- Automatic updates: Results update instantly when you change either date.
- Order independent: Enter dates in any order - the calculator always shows the absolute difference.
- Leap years: Calculations automatically account for leap years.
- Inclusive vs exclusive: This calculator counts the number of days between dates (exclusive of start date).
- Month approximations: Month calculations use 30.44 days (average month length).
- Year approximations: Year calculations use 365.25 days (accounting for leap years).
Frequently Asked Questions
Does the order of dates matter?
No! The calculator automatically determines which date is earlier and calculates the difference.
Are the start and end dates included?
The calculator counts the days between the dates, which means it counts from the start date to the day before the end date.
Why are months and years approximate?
Months have different lengths (28-31 days) and years vary due to leap years. We use averages: 30.44 days/month and 365.25 days/year.
Can I calculate business days only?
This calculator shows total calendar days. For business days, you'd need to manually subtract weekends and holidays.
How accurate is the calculation?
The day count is 100% accurate. Month and year conversions are approximations based on average lengths.
Can I use historical dates?
Yes! The calculator works with any dates, past or future. If you're looking to calculate someone's current age rather than a raw day count, try the age calculator instead.
