About date difference calculator
Finding the gap between two dates sounds simple, but months have different lengths, so the answer can be given in several ways. This tool shows years, months, weeks and days.
How the breakdown works
Full years are counted first, then full months, then the leftover days. From 15 January 2024 to 20 March 2025 is 1 year, 2 months and 5 days, which is also 430 days in total.
Things to decide
- Whether the start date is included. Counting both ends adds one day.
- Whether you need calendar days or only working days; use the Working Days Calculator for the latter.
Another worked example
From 1 March 2026 to 31 March 2026 is 30 days, or 4 weeks and 2 days. Counting both the first and last day makes it 31 days, which matters for things such as hotel nights versus days of a course.
Weeks and months
A week is always 7 days, but a month is 28 to 31 days. When precision matters, such as for a contract, state whether you mean calendar months or a number of days.
