How to Calculate the Difference Between Two Dates
This calculator gives you the gap between two dates in three useful formats: years/months/days, raw totals (days/weeks/months), and business days (Monday through Friday only). Pick a start date and an end date — the calculator does the rest.
What Are Business Days?
Business days exclude Saturdays and Sundays. The result here is a calendar-based count and doesn't subtract public holidays — those vary by country and region, so check your local holiday schedule for an exact working-days figure.
Common Use Cases
- Project deadlines: how many days until launch?
- Travel & vacation: count the days between today and your trip.
- Pregnancy / due dates: weeks elapsed since conception or LMP.
- Subscription cycles: days into a billing period.
Frequently Asked Questions
Does it include the start date in the count?
The total-days count is the gap between the two dates, so a 1-day gap (Monday to Tuesday) shows as 1 day. If you want an inclusive count, add 1 to the result.
What if the end date is before the start date?
The result will not display — please swap the dates so the end date is later than (or equal to) the start date.