Days Between Dates Calculator
Calculate the number of days, weeks, and months between two dates. Includes weekdays-only option for business day math. Free, no signup.
How many days until the project deadline, the lease end, the visa appointment, or the baby's due date? Pick two dates and get the exact count — total days, plus the breakdown in weeks and months, so "90 days" becomes a plan rather than a guess.
A weekdays-only mode counts business days for notice periods, SLA clocks, and payroll cutoffs — the calculation everyone does wrong by hand around weekends and holidays.
100% in-browser · no upload · no signup · nothing you paste or drop here leaves your device
Date Difference & Age Calculator
Calculate exact age or the duration between two dates — down to the second.
Someone born on 1990-06-15 wants to know their exact age today.
- Age:36 years, 4 months, 7 days
- Total days lived:13,278
- Total weeks:1,896
Date arithmetic follows the proleptic Gregorian calendar and ignores historical calendar reforms; leap years and DST transitions can shift wall-clock results.
About this days between dates calculator
This page covers date duration calculator, calculate days until, business days between two dates, how many days calculator — all the same underlying task as days between dates calculator. The tool above is FreeToolHub's date diff embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
Does the count include both the start and end date?
The standard result counts the days elapsed between the two dates (end minus start). For notice periods and legal deadlines, check whether your rule counts calendar days or business days, and whether the day of the event itself counts — the weekdays-only mode exists for exactly this distinction.
How do I count only business days?
Enable the weekdays-only option and the calculator excludes Saturdays and Sundays from the total. It does not skip public holidays — those vary by country — so add or subtract holiday dates manually when a contract or SLA requires holiday-aware counting.