Date Difference Calculator
Last updated: June 7, 2026Days, weeks and months between dates.
Date Difference Calculator is a free online calculator to days, weeks and months between dates. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Date Difference Calculator
The Date Difference Calculator finds the exact time between two dates — in total days, weeks, months and hours, plus a years/months/days calendar breakdown. Great for deadlines, ages, anniversaries and countdowns. Free and instant.
Read the full guide: How to Calculate Days Between Two Dates (Free)
- 1Pick the start date.
- 2Pick the end date.
- 3Read the difference in days, weeks, months and a full breakdown.
Multiple units
See the gap in days, weeks, months and hours at once.
Calendar breakdown
Get the precise years, months and days between the dates.
Free & private
Runs on your device with no sign-up.
Days until a deadline or exam
Set the From date to today and the To date to your deadline, exam or event to see exactly how many days are left, plus the figure in weeks and a years, months and days breakdown. Because it counts the gap between the two dates, add one day if you want to include today itself.
How long ago a date was
Put the past date in From and today in To to find out how long ago something happened, such as a start date, purchase or milestone. The calculator shows the elapsed time in total days and as a years, months and days breakdown, and the order of the two dates never matters.
Time between two project dates
Enter any two calendar dates, neither of which has to be today, to measure the span between them for a contract, billing period, notice or project. You get the total in days, the rounded number of weeks and approximate months, and an exact years, months and days breakdown of the interval.
Date Difference Calculator — frequently asked questions
How do I count the days between two dates?
Pick both dates and the tool shows the total days instantly, along with weeks, months and a years/months/days breakdown.
Does it include both the start and end day?
It counts the number of days between the two dates. Add one if you need to include both endpoints.
Can I calculate age with it?
Yes — set the start date to a birth date and the end date to today to see an age in years, months and days.
Is it free?
Yes, completely free.
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