Date difference calculator
Find the number of days between two dates (with an optional inclusive toggle).
What is a date difference calculator?
A date difference calculator tells you how much time lies between two calendar dates. People use it for project planning, travel, subscriptions, billing cycles, and tracking deadlines. The most common query is “days between dates”, which is exactly what this tool computes.
How to calculate days between two dates
The simplest method is to convert both dates into a numeric time value and subtract. This calculator uses local calendar dates to avoid timezone surprises. If you enable inclusive counting, it adds 1 day so both the start and end dates are included.
Why use this online date difference calculator?
It’s fast, mobile-friendly, and shows a breakdown into weeks + remaining days. This helps when you want to think in “weeks” rather than large day counts.