Utility tool
Date Difference Calculator
Count the days, weeks and business days (Mon–Fri) between two dates.
Free｜No sign-up｜Files stay on your device
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Support us／Ko-fiAbout Date Difference Calculator
Counting days on a calendar for contracts, leave, exams or project timelines is error-prone, especially across months and years.
Besides total days, you get weeks and business days (Monday to Friday), and you can choose whether to count the end date.
Great for
- ・Contract and warranty periods
- ・Project schedules and deadlines
- ・Countdowns to exams and events
How to use
- 01Fill in each field.
- 02Results are calculated instantly below.
Why use it
Private by design
Everything runs locally in your browser. Nothing passes through a server.
Instant
No software to download and no account to create.
Works everywhere
Desktop, phone, or tablet — any modern browser.
Free forever
No watermarks and no usage limits.
Frequently asked questions
Are public holidays excluded from business days?
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Only Saturdays and Sundays are excluded. Public holidays differ by country, so subtract them yourself if needed.
Is this tool free? Do I need an account?
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It's completely free. There's no sign-up, no login and no usage limit.
Are my files and data safe?
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Everything is processed inside your browser. Your files are never uploaded to our servers and disappear when you close the page.
Does it work on my phone?
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Yes. The page is fully responsive and works in current versions of Chrome, Safari and Edge on iPhone, Android and tablets.
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days between dates/date calculator/day counter/business days calculator