About Date & Age Calculator

Date & Age Calculator provides free online calculators that make everyday date and age questions quick to answer — how many days until a deadline, what the date will be in 90 days, or exactly how old someone is.

The tools are built to be simple: no accounts, no settings to configure, and the answer appears as soon as you enter a date. Calculations run in your browser and follow the Gregorian calendar, taking month lengths and leap years into account.

Our calculators

• Date Calculator — days between dates, business days, and adding or subtracting days, weeks, months or years.
• Age Calculator — exact age, age on any date, next birthday and age difference.

Accuracy

Every calculation is covered by automated tests, including leap years, February 29 birthdays and month-end dates. The results are provided for general information; if something looks wrong, please let us know.