Date Calculator
Calculate days between dates, add or subtract days, and find the day of the week for any date.
Frequently Asked Questions
How to Calculate Days Between Two Dates
Enter a start date and an end date to instantly see the difference in days, weeks, months, and years. The calculator also shows business days (weekdays only), which is essential for project timelines, contract deadlines, and payroll calculations.
Adding and Subtracting Days
Need to know the date 90 days from now? Or 30 days before a deadline? The add/subtract feature handles date arithmetic across month boundaries and leap years. Common uses include calculating warranty expiration dates, notice periods, payment due dates, and delivery windows.
Common Use Cases
- Project management and deadline tracking
- Calculating business days for contracts and SLAs
- Rental and lease period calculations
- Warranty and return window deadlines
- Payroll and billing cycle planning
Related Tool
Need to calculate someone's exact age? Try our Age Calculator for precise age breakdowns in years, months, and days.