Date calculator
Count days between dates or find a date in the future or past.
Free No sign-up Runs in your browser
How it works
How to use the Date Calculator tool
- 1
Choose a mode
Days between dates, or add/subtract.
- 2
Pick dates
Start defaults to today.
- 3
Read the result
Days, weeks, weekdays and an exact Y/M/D breakdown.
Weekdays and end dates
Weekday counts exclude Saturdays and Sundays (public holidays vary by country and aren’t excluded). “Including end date” adds one day — useful for leave and rental periods counted inclusively.
Month arithmetic
Adding a month to 31 January gives the last day of February, the same convention used by banks and spreadsheet software.
Limitations
We’d rather be upfront about what this tool can’t do yet:
- Public holidays aren’t excluded from weekday counts.
FAQ
Frequently asked questions
Is my data sent anywhere?
No. All processing happens locally in your browser. Nothing you enter is uploaded, stored or logged.
How many days until a date?
Leave the start as today and pick the target date as the end.
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