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Date Calculator — Free Online Tool
Need to know how many days remain until a deadline, how long a notice period lasts or how many days passed since an event? This date calculator counts the number of days between any two calendar dates. Pick a start date and an end date, and the total appears straight away. It does not matter which date is earlier, because the tool always returns the absolute gap. People use it for notice periods and probation dates at work, counting days to an exam or wedding, working out how long a fixed deposit has run, checking the gap between invoice and payment dates, and planning travel or visa stays where the number of days is limited. Indian taxpayers can also use it to count the days between a GST or income tax due date and the date a return was filed, which is helpful when estimating late-fee periods. The result is shown in whole days. The calculator needs no sign-up, stores nothing and works offline once the page has loaded. For a person's age in years and months, use the Age Calculator instead.
Use our Date Calculator on AllConvertor — no registration, no download, works on iPhone, Android, Windows, and Mac. All processing runs in your browser when possible for maximum privacy and speed.
How to use Date Calculator
- Pick the Start date from the date picker.
- Pick the End date.
- Read the total number of days displayed below.
- Add one day yourself if you need an inclusive count.
Key benefits
- ✓ 100% free — no paywall or trial limits
- ✓ No account or email required
- ✓ Mobile-friendly responsive design
- ✓ Instant results in your browser
- ✓ Secure — data stays on your device
- ✓ Trusted by thousands of users daily
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Frequently Asked Questions
How do I calculate days between two dates?
Select a start date and an end date. The calculator shows the total number of days between them straight away.
Does the calculator include the start and end dates?
It counts the difference between the dates, so Monday to Wednesday is 2 days. Add 1 if you want to count both the first and last day inclusively.
Does the order of the dates matter?
No. The result is always a positive number, whichever date you enter first.
Can I use it for a notice period or due date?
Yes. Enter your start date and the last working day to see the total number of calendar days. It does not exclude weekends or public holidays.
Can it show the result in months or years?
This tool outputs days. For a person's age in years, months and days, use the Age Calculator.