Date Difference Calculator
Date Difference Calculator: free, accurate and easy to use. Results update instantly in your browser, with no sign-up.
How to use
Calculate the exact difference between two dates in years, months and days, plus the total days, weeks and working days (Monday to Friday). It is useful for project deadlines, contracts, pregnancy timelines and countdowns.
- Enter your numbers.
- Results update instantly as you type.
- Adjust the values to compare scenarios.
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Frequently asked questions
Are both dates counted?
The result counts the days between the dates, so the start date is included and the end date is not. Add one day if you need both counted.
Do business days include holidays?
Business days exclude Saturdays and Sundays only. Public holidays and local weekends are not taken into account.
Is it free?
Yes. All calculators are free, with no sign-up and no limits.
Is my data stored?
No. Calculations run in your browser and nothing you enter is sent or stored.
How accurate are the results?
Calculations use standard formulas. Results are estimates for general information; for important decisions, confirm with a professional or your provider.