Date Difference Calculator

Find how many days lie between two dates.

Date Difference Calculator helps you count the days between two calendar dates. Enter start date and end date, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Date difference calculator does Date Difference Calculator is built for dates, durations, ages, and schedules. Count the days between two calendar dates. You enter start date and end date, then Simple Calculators computes the result instantly. Calendar math follows common civil-calendar rules used in everyday planning. How the math works Both dates are treated as local midnight, and the calculator counts the whole days from one to the other. The formula: Days = end date − start date. Counts the midnights in between; add 1 if you want both the start and end dates counted.