Count the time between two dates
Figuring out how many days until a deadline, or how long ago something happened, means counting across months of different lengths and leap years. This calculator takes two dates and returns the gap in days, weeks, and months, so you get an exact answer instead of an approximation scribbled on a calendar.
How to use it
- Pick the start date and the end date.
- Read the difference in days, weeks, and months.
- Swap the dates to count forward or back.
Where it helps
- Counting down to an event or deadline.
- Measuring how long ago something occurred.
- Working out notice periods or durations.
Questions people ask
Does it include both end dates? It measures the span between them; whether you count the final day depends on your purpose, so adjust by one if you need it inclusive.
Is anything stored? No — the calculation happens in your browser.