Date Interval Calculator
Calculate the exact duration between two dates in years, months, and days.
Calculate the exact duration between two dates in years, months, and days.
Enter the input value, choose source and target units, and read the converted result shown instantly.
Converted Value = Input Value × (From Unit Factor / To Unit Factor). For non-linear domains, category-specific standard formulas are applied.
If 1 source unit equals 1000 target units, then 2 source units equal 2000 target units. Use the live converter above for exact values.
Q: Is this conversion accurate?
A: Yes, it uses fixed reference factors or tested standard formulas.
Q: Can I reverse the conversion?
A: Yes, swap the units or use the reverse conversion direction.
Our Date Calculator is a versatile tool designed to help you handle various date-related calculations with ease. Whether you need to find the exact number of days between two specific dates, or determine a future or past date by adding or subtracting time, this tool has you covered.
Use the "Duration" tab to find the time difference between two dates. Enter a start and end date to see the total number of days, as well as the breakdown in years, months, and weeks. You can choose to include the end date in the calculation for inclusive counting.
Switch to the "Date +/- Days" tab to calculate a future or past date. Simply enter a start date and the number of years, months, weeks, or days you want to add or subtract. This is perfect for calculating expiration dates, project deadlines, or estimated delivery times.
The "Business Days" tab allows you to calculate the number of working days between two dates, automatically excluding weekends. This is essential for payroll, leave calculation, and project management.
How do I calculate the days between two dates?
Simply enter the "From" and "To" dates
in our Duration calculator. It will instantly show you the total days and the full duration breakdown.
Does this calculator include the end date?
By default, date difference calculations
usually exclude the end date (calculating the "nights" between dates). However, you can check the
"Include end date" box to count both the first and last day (e.g., for leave applications).
Can I calculate a date 90 days from now?
Yes! Use the "Date +/- Days" tab, select
"Today" as the start date, ensure "Add" is selected, and enter "90" in the Days field.