Date Calculator
Add or subtract days, weeks, months, or years from any date. Calculate the exact difference between two dates.
Result Date
How Date Calculation Works
The date calculator handles all date arithmetic accurately, including leap years (years divisible by 4, except centuries not divisible by 400). When adding/subtracting months, the day is adjusted to the last day of the target month if the original day exceeds the target month's length.
About this Calculator
The Date Calculator is a free, easy-to-use tool for add, subtract, days between. Simply enter your values and get instant, accurate results — no signup required. All calculations run locally in your browser, so your data stays completely private.
Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.