Date Difference Calculator
Calculate the number of days, weeks, months and years between two dates, count working days excluding weekends and holidays, and add or subtract days from a date.
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How to: Date Difference Calculator
- Choose a start and end date.
- Set weekend days and optional holidays.
- See total days, working days and more.
How many days until a deadline, a holiday or a due date? How many working days does a project have? This calculator counts the exact time between two dates in days, weeks, months and years, counts business days while excluding weekends and public holidays, and can add or subtract days from a date to find a future or past deadline.
Common uses
- Plan project timelines and count working days to a deadline.
- Calculate notice periods, contract terms and payment terms such as net 30.
- Count days until a wedding, exam, trip or product launch.
- Work out leave days or the length of a stay for visa rules.
Tips for best results
- Add your country's public holidays to get accurate working days.
- Use “Include the end date” for hotel nights versus days of leave appropriately.
- For age calculations, use the Age Calculator.
- Results use calendar dates, so daylight saving changes do not affect them.
Working days around the world
Most of the world uses a Saturday–Sunday weekend, but some countries in the Middle East use Friday–Saturday, others have a Friday-only or Sunday-only weekend, and many businesses work six days a week. Choose the pattern that matches your workplace, then list holidays as dates separated by commas, such as 2026-12-25, 2026-12-26.
Adding days to a date
Payment terms, delivery estimates and legal deadlines are often expressed as “within 30 days”. Enter a number of days in “Add / subtract days” to see the resulting date and weekday. Use a negative number to go backwards, for example to find when a 90-day window started.
Why use FreePDF for Date Difference Calculator?
| FreePDF | Typical upload-based sites | |
|---|---|---|
| What you type is sent to a server | No – stays in your browser | Often |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Works offline after loading | Yes, for most tools | No |
Frequently asked questions
Is the end date included
By default no – from Monday to Friday is 4 days. Tick “Include the end date” to count both days, which gives 5, as is common for leave and booking periods.
Can I use Friday–Saturday weekends
Yes. Choose the weekend days used in your country, such as Friday–Saturday in parts of the Middle East or Sunday only in some countries.
Is Date Difference Calculator really free?
Yes. Every tool on FreePDF is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. FreePDF processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. FreePDF works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.