How does the 'Include end date' feature work?
Normally, calculating days between Monday and Tuesday yields 1 day. If you check 'Include end date', it yields 2 days (counting both Monday and Tuesday).
Tool Categories
Free Days Between Dates Calculator | 1ClickTools
Calculate the exact number of days, weeks, months, and years between two dates. Free, fast, and easy to use online date calculator.
Frequently Asked Questions
Does this account for leap years?
Yes! Our calculator uses standard calendar logic to perfectly account for leap years and months with varying days.
Can I enter dates in the past?
Absolutely. You can select any two dates, past or future, and we will accurately calculate the distance between them.
How accurate is this days calculator tool?
All processing runs entirely in your browser using verified algorithms. Results are computed with full double-precision — no server-side rounding or data transmission occurs.
Is this Days Between Dates Calculator free to use for commercial and personal projects?
Yes, 1ClickTools provides completely free, unlimited access to the Days Between Dates Calculator for both personal and commercial projects. There are no registration forms, hidden fees, software downloads, or monthly subscription limits.