Date Calculator
Calculate the number of days between two dates or find what date will be after a specific number of days. Useful for planning, deadlines and scheduling.
Mode
Allowed range: 1900–2100.
Allowed range: 1900–2100.
Allowed range: 1900–2100.
Allowed range: 1900–2100.
Use a whole number. Negative values move backward in time.
Quick buttons
Result
Result will appear here.
How it works
This tool calculates the difference between dates or determines a future date based on a number of days. All calculations happen locally in your browser.
Examples
Start date: 2026-01-01 End date: 2026-01-10 Output: Days between dates: 9 days
FAQ
Does this count full calendar days?
Yes. The tool compares calendar dates, so the result stays stable without timezone-based hour drift.
Can I calculate days until a past date?
Yes. The tool will show that the selected date was a number of days ago.
Why are months marked as approximate?
Months have different lengths, so the month value is a practical estimate based on the day count.