Date Calculator
Calculate the time span between two dates, or add/subtract days from a date.
Calculate nowHow it works
Choose a mode
Difference between two dates, or add/subtract days.
Enter dates
Start/end dates, or a base date and number of days.
Read the result
The result is calculated instantly.
Benefits
Good to know about this tool
Calculates the number of days between two dates, or adds/subtracts a number of days from a date.
Because deadlines, durations and scheduling often require a quick date calculation.
- Calculate the remaining term of a contract
- Determine a due date from a payment term
- Check the age of a document in days
- Time zones and leap years are handled automatically
- Double-check the result for legally binding deadlines
Frequently Asked Questions
Are leap years taken into account?
Yes, the calculation is based on native JavaScript date logic and automatically accounts for leap years.
Can I also calculate backwards?
Yes, in 'add/subtract days' mode, days can also be subtracted.
Is my data stored?
No, the calculation happens entirely locally in your browser.
The information, templates, scripts, calculations and recommendations provided are intended for educational and assistance purposes only. Always review and test any generated result before production use. IT Smart Service accepts no liability for misuse, data loss, outages, security incidents, or legal, financial or technical damages arising from incorrect or improper use. Responsibility for validation, testing and deployment decisions rests with the user.
Need personal support? Our team can help with anything beyond this tool.
Need professional IT support?
Our team can help if the free tool is not enough for your project.