Calculate Days Between Dates
From Wednesday, March 18, 2026
To Friday, April 17, 2026
Quick Reference
Date Calculator: Days Between Dates
Calculate the number of days, weeks, months, and years between two dates. Add or subtract days from any date. Free online date difference calculator.
How It Works
Enter a start date and an end date. The calculator instantly shows the exact difference in days, weeks, months, and years. You can also enter a starting date and add or subtract a specific number of days to find the resulting date.
Common Use Cases
- Calculating how many days until a deadline, birthday, or vacation
- Figuring out the number of working days between two dates
- Computing project durations for planning and estimation
- Determining the date X days from today (e.g., 90 days from now)
Frequently Asked Questions
Yes, the calculator correctly handles leap years and varying month lengths for all calculations.
Yes, select the 'Add/Subtract Days' mode, enter a date, and specify how many days to add or subtract.
The standard calculation includes all days. For business days only, use our dedicated Business Days Calculator.
The standard calculator counts all days. For business days only (excluding weekends), use our dedicated Business Days Calculator tool.
Use the 'Add/Subtract Days' mode, select today's date, enter 90 in the days field, and the tool instantly shows the resulting date.
Yes, if the end date is before the start date, the result shows a negative difference — useful for calculating how many days ago something occurred.
Yes, the calculator shows the difference in years, months, and days. For a dedicated birthday calculator with more features, try our Age Calculator tool.