Date Calculator - Free Online Days Between Dates Tool

Whether you need to count down to an important event, calculate a project deadline, or determine how many business days fall between two dates, our free Date Calculator provides all the answers in one place. It handles the most common date arithmetic operations that come up in both personal and professional life. Enter a start date and end date to instantly see the difference expressed in days, weeks, months, and years. The tool also calculates the number of business days (Monday through Friday) between your selected dates, which is essential for project planning, legal deadlines, and payroll calculations where only working days count. Beyond date differences, the calculator lets you add or subtract a specified number of days from your start date. This is perfect for determining future deadlines (such as "what date is 90 days from today?") or looking back at past dates (such as "what date was 30 days ago?"). Both the forward and backward results are displayed simultaneously for convenience. Date calculations might seem simple, but they are surprisingly complex when you factor in months with different lengths, leap years, and the distinction between calendar days and business days. This calculator handles all of these nuances automatically, delivering accurate results that you can rely on for planning, scheduling, and record-keeping.