Exact Days · Weeks · Months · Business Days
Our Days Between Two Dates Calculator instantly works out exactly how much time separates any two dates. Simply enter a start date and an end date, and the tool gives you the total number of days, along with the equivalent in years, months, weeks, business days and even hours. It is one of the simplest yet most useful date calculator tools available online, built for anyone in the UK, USA, Canada, or anywhere else who needs an accurate date difference in seconds.
Whether you are counting down to a wedding, working out a contract deadline, checking how many working days remain before a project is due, or simply curious how long ago something happened, this date duration calculator removes the need for manual counting on a calendar. It automatically accounts for leap years, varying month lengths, and weekends, so the result is accurate every time.
Calculating the number of days between two dates by hand is easy to get wrong, especially across leap years or when a date range spans several months. A dedicated days between two dates calculator removes that risk entirely. Here are some of the most common reasons people in the UK, USA and Canada use this kind of tool:
Alongside the total calendar day count, this tool also functions as a business days calculator (also called a working days calculator in the UK). It automatically excludes Saturdays and Sundays from the count, giving you the number of Monday-to-Friday working days between your chosen dates. This is especially useful for shipping estimates, invoice payment terms, and HR calculations where "5 working days" means something different from "5 calendar days." Note that this calculator counts standard weekends only; it does not automatically remove UK bank holidays, US federal holidays, or Canadian statutory holidays, since these vary by region and year.
Date requirements differ slightly by country. In the UK, "working days calculator" searches are common for HMRC deadlines, DVLA processing times, and tenancy notice periods. In the USA, people frequently search for a "date calculator" to work out federal filing deadlines, court dates, or how many days until a lease ends. In Canada, a "days until calculator" is often used for immigration processing times through IRCC and for provincial legal notice periods. This tool is built to serve all three audiences with one accurate, universal calculation engine.
Enter your start date and end date into the calculator above. It instantly works out the total number of days, along with the equivalent in weeks, months and business days, accounting for leap years automatically.
A business days calculator counts only working weekdays (Monday to Friday) between two dates, excluding weekends. It is commonly used in the UK, USA and Canada to estimate delivery times, contract deadlines and payment terms.
The calculator shows the number of full days between the two dates you enter. If you need the end date included as a full day, simply add one day to your end date before calculating.
Yes. The calculator works across any range of years, whether you are counting a few days or many decades, and correctly accounts for leap years in the calculation.
The calculator gives a precise day count based on the calendar. For official visa, immigration, or legal deadlines, always confirm the exact rules with the relevant authority, as some processes count days differently.