Calculate the days, workdays, weeks, and months between two dates. Supports date addition/subtraction and countdown timers.
Days calculation: Convert dates to millisecond timestamps, subtract, and divide by 86,400,000 (milliseconds per day)
Workday calculation: Excludes Saturdays and Sundays (does not account for public holidays)
Leap year rule: Divisible by 4 but not by 100, or divisible by 400
Date addition: Automatically handles month boundaries, year transitions, and leap years
Free online date difference calculator. Enter two dates to calculate the difference in days, weeks, months, and workdays. Supports date addition/subtraction and countdown timer. Great for budgeting, homework, and everyday calculations. It is completely free, requires no registration, and all processing happens locally in your browser — your data never leaves your device.
Yes, it is 100% free with no registration and no usage limits.
Absolutely. All processing runs locally in your browser — nothing is uploaded to any server.
Free online date difference calculator. Enter two dates to calculate the difference in days, weeks, months, and workdays. Supports date addition/subtraction and countdown timer. Suitable for developers, students, and everyday users.