Date Difference Calculator
Calculate the exact difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Perfect for finding the number of days between dates.
Last updated: July 17, 2026
The difference between two dates is the number of days, weeks, months, and years elapsed between them, accounting for leap years and varying month lengths. Enter a start and end date below for the exact breakdown.
There are 0 days between July 20, 2026 and July 20, 2026.
Enter values and calculate
Fill in the form above and press Calculate to see your result.
How this calculator works
Provide any two dates and the calculator measures the elapsed time between them. Results include years, months, weeks, days, hours, minutes, seconds, and total days for flexible reporting.
Dates can be entered in either order; the engine reports the absolute span. Leap years and month lengths are included automatically.
Worked example
Between January 1 and July 1 of the same year there are 181 total days in a non-leap year—the calculator shows the full breakdown so you do not need to count manually.
For employment tenure, enter the hire date and today's date to see years, months, and days of service in one view.
Practical use cases
Trip and vacation length, subscription billing periods, pregnancy tracking, rental agreements, and project phase durations all rely on knowing exactly how far apart two dates are.
Legal discovery windows, warranty periods, and academic term lengths frequently need both total days and higher-level units like months or years.
Switch to business days mode when your policy counts working days only, or use Add Days when you need to project forward from a known start date.
Frequently asked questions
The calculator measures the span from the start date to the end date and breaks it into years, months, weeks, days, and smaller units using calendar-accurate rules.
The result shows elapsed time between the two dates. For inclusive day counts (common in travel), add one day to the day total if your use case requires it.
Enter dates in either order. The calculator reports the absolute difference between the two calendar dates.
Typical uses include trip length, employment tenure, subscription periods, pregnancy tracking, and project duration between milestones.
Yes. February 29 and varying month lengths are included automatically.
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Written & Reviewed by
DateCalx Team
Editorial Team
The DateCalx Team researches, builds, tests, and reviews every calculator to ensure accurate, reliable, and easy-to-understand date and time calculations. Our goal is to provide fast, trustworthy tools for everyday personal, educational, and professional use.
Last reviewed: July 17, 2026
Learn more in our About, Editorial Policy, and Methodology pages, or contact the DateCalx Team.