DateCalc

Date Duration Calculator

Calculate the exact number of days, months, and years between any two dates. Instantly. Privately.

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How to Use the Date Duration Calculator

  1. 1Enter your start date — use the date picker or type it in
  2. 2Enter your end date — or click “Today” for the current date
  3. 3View your results — they update instantly as you type
  4. 4Click Copy to save your result

Frequently Asked Questions

How do I calculate the number of days between two dates?
Enter your start and end dates into the calculator above. The result updates instantly showing total days, weeks, months, and years between the dates.
Does the date duration calculator count the end date?
By default, the calculator counts full 24-hour periods between dates (exclusive). You can toggle "Include end date" to add 1 day to the total.
Is the date duration calculator free?
Yes. This calculator is completely free to use with no ads, no accounts, and no hidden charges.
Is my data stored or sent to a server?
No. All calculations happen in your browser. Your dates never leave your device. There are no servers involved.
How many days are in a year for this calculator?
The calculator uses the actual calendar, accounting for leap years. The result in years, months, and days reflects the real calendar difference, not an approximation.
Can I calculate age with this calculator?
Yes. Click the "Age" tab to calculate age between a date of birth and any "as of" date, including next birthday countdown.
Does the calculator work on mobile?
Yes. The calculator is fully responsive and works on all screen sizes. Native date pickers provide a great mobile experience.

About This Tool

This calculator runs entirely in your browser. No data is sent to any server. We don’t track your calculations, show ads, or require an account. Built with privacy and speed in mind.

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