How many days between two dates?
This calculator gives the exact number of calendar days from a start date to an end date — every day counts, including weekends and holidays. It also breaks the span down into whole weeks, the precise number of years, months and days, and splits it into weekdays and weekend days, so you get the full picture in one place.
Days vs. business days
"Days between dates" counts every day on the calendar. Business days count only working days — Monday to Friday, minus public holidays. This page shows both worlds: the total calendar days and the weekday/weekend split. If you only need working days, use the Business Days Calculator.
Including or excluding the end date
By default the result is the difference between the two dates, so the end date is not counted (the gap, not the span). Tick "Include end date" to count both endpoints — useful for hotel nights, rental periods, billing windows and anything measured inclusively.
What you can use it for
- Counting the days until or since an event, anniversary or deadline
- Working out how long a project, trip or subscription lasts
- Calculating notice periods, contract durations and billing cycles
- Measuring the gap between two milestones in days, weeks or months
Frequently asked questions
How do I count the number of days between two dates?
Pick a start date and an end date. The calculator instantly shows the total calendar days between them, plus the breakdown in weeks, the exact years, months and days, and how many are weekdays or weekend days.
Does the calculation include the last day?
By default the count is the difference between the two dates, so the end date is not included. Tick "Include end date" to count both the start and end dates, which adds one day to the total.
What is the difference between days and business days?
Days between dates counts every calendar day, including weekends and holidays. Business days count only working days. This tool shows both: the total calendar days plus the weekday and weekend split. For working days only, use the Business Days Calculator.