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Date & Time calculators

Free online calculators to add or subtract days, count weekdays, figure out age, due dates, or how long until an event.

Dates are surprisingly awkward. These tools take the guessing out.

Age Calculator

Calculate exact age in years, months, and days from a date of birth, with total days, total weeks, and days until your next birthday.
Date Difference Calculator

Count the exact number of days, weeks, months, business days, hours, and minutes between any two dates.