Free calculators and unit converters for general and everyday use.
Calculators » Date & Time » Date Arithmetic
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can count any number of days, weeks or months from a given date; use negative value to count backwards (date subtraction) and positive value to count forwards (date addition).
Android: Use this date calculator offline with our all-in-one calculator app.
This calculator makes it very easy for you to perform date arithmetic. You can add days, weeks or months to any given date making it very useful for setting reminders or mark a date for special occassions and more. Likewise, you can subtract days, weeks or months from any date.
To find time duration between two dates in days, weeks or months, use our date interval calculator.