Date & Time Tools

Dates and time calculations are surprisingly tricky — variable month lengths, leap years, and timezone boundaries mean manual date math is error-prone. Our date and time tools handle all of that complexity under the hood using the robust date-fns library, so you get accurate results instantly. The Age Calculator computes your exact age in years, months, and days from your birthdate. The Date Difference Calculator finds the precise number of days between any two dates — useful for countdowns, age verification, or project planning. The Add Days Calculator lets you add or subtract any number of days from a given date, correctly crossing month and year boundaries. All three tools are free, require no sign-up, and work entirely in your browser.