Free date difference calculator. Calculate exact days, weeks, months, and years between any two dates.
📅
Date Difference Calculator
Free · Instant · No Signup
Formula
Formula
Days = |Date2 − Date1| ÷ 86,400,000 milliseconds
JavaScript Date objects measure time in milliseconds. Divide by 86,400,000 (ms per day) for days. 1 week = 7 days, 1 month ≈ 30.44 days, 1 year ≈ 365.25 days.
Frequently Asked Questions
How many days between two dates?+
Enter both dates and click Calculate. The result shows exact days, weeks, months, and hours between the two dates.
How do I calculate how many days until an event?+
Enter today as start date and your event date as end date. The calculator shows exact days remaining.
What is the difference between days and working days?+
Calendar days includes weekends. Working days excludes weekends (and optionally holidays). This calculator shows calendar days.