Date calculator
Free date calculator. Find the days, weeks, months, and years between two dates, or add and subtract days from a date, with an option to count business days only.
How to use
- Pick a mode. Choose whether to find the duration between two dates or to add and subtract days from a single date.
- Enter your dates. Select a start and end date for duration, or a start date and a number of days to add or subtract.
- Set business-days if needed. Turn on the business-days option to exclude weekends and US public holidays from the count.
- Read your result. See the total days along with a years, months, and weeks breakdown, or the resulting date, instantly.
Features
- Two ways to calculate. Measure the gap between two dates, or add and subtract days to find a new date, all in one tool.
- Full duration breakdown. Reports the total number of days plus an easy-to-read years, months, and weeks summary.
- Business-days option. Counts only working days by skipping weekends and US public holidays when you need a workday total.
- Add or subtract days. Enter any positive or negative number of days to jump forward or backward from a start date.
- Instant results. Every change updates the answer immediately, with no button to press or page to reload.
When to use it
- Counting the exact number of days until a deadline, event, or holiday.
- Working out a delivery or completion date by adding business days.
- Finding how long ago a past date was in years, months, and days.
- Calculating a contract or notice-period end date from a start date.
- Planning project milestones that skip weekends and public holidays.
Is it private?
Everything runs entirely in your browser, and nothing you enter is ever sent to a server.
Frequently asked questions
Is this date calculator free?
Yes, it is completely free with no sign-up, no limits, and no install required.
How does it count days between two dates?
It measures the whole days from the start date to the end date. You can read the result as a single day total or as a years, months, and weeks breakdown.
What counts as a business day?
With the business-days option on, the tool counts Monday to Friday and skips Saturdays, Sundays, and US public holidays.
Can I subtract days as well as add them?
Yes. Enter a negative number of days, or use the subtract option, to move backward from your start date.
Does it handle leap years?
Yes. The calculator accounts for leap years automatically, so February 29 and long years are counted correctly.
Do you store my dates?
No. Everything is calculated in your browser and nothing you enter is sent to or saved on a server.
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