Date Calculator
Calculate days between two dates or add and subtract days, months and years to any date.
Difference
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Online date calculator
Calculate how many days are between two dates (broken down into years, months and weeks) or add and subtract days, months and years to any date. Perfect for deadlines, due dates, pregnancy and planning.
Common uses
- How many days until an event or deadline.
- Calculate due dates by adding days to an invoice.
- Exact age in years, months and days.
How to use the date calculator
- Choose the mode: "Days between dates" or "Add / Subtract days".
- Pick the dates with the calendar picker.
- Read the total difference in days, broken down into years, months and weeks, or the resulting date after adding or subtracting.
Practical deadline and due date cases
- How many days until a delivery, an exam or an important event.
- Invoice due date by adding 30, 60 or 90 days to the issue date.
- Exact age of a person in years, months and days.
- Pregnancy weeks or planning dates.
Frequently Asked Questions
How many days are between two dates?
The tool calculates the exact difference in days and breaks it down into years, months and weeks.
Can I add or subtract days to a date?
Yes. The Add / Subtract mode takes a base date and adds or subtracts days, months and years to give you the resulting date.
Is it useful for deadlines and due dates?
Yes, it is ideal to know how long until a delivery, a payment or an event, or to calculate due dates.
Is the date calculator free?
Yes, it is free, no registration needed, and works offline after the page loads.