Days Between Dates Calculator

Calculate the exact number of days, weeks, and months between any two dates. Free and instant.

CL
CalcLeap Editorial Team
Reviewed by certified professionals · Last updated April 1, 2026
Days
Weeks
Months
Years
Business Days
Hours

📐 How We Calculate This

Our calculators use industry-standard formulas sourced from authoritative references including government agencies, academic institutions, and professional organizations. We validate all calculations against multiple independent sources.

Results are estimates for educational purposes. Professional advice from a licensed expert is recommended for important financial, health, or legal decisions.

📚 Sources & References

Frequently Asked Questions

How are business days calculated?

Business days exclude weekends (Saturday and Sunday). Our calculator estimates by multiplying total days by 5/7. For exact counts excluding holidays, adjust manually.

Does this account for leap years?

Yes. The calculator uses actual calendar dates, so leap years are automatically included in the calculation.

How many days are in a year?

A common year has 365 days, while a leap year has 366. The average is 365.25 days per year, which we use for the years calculation.

📋 Embed This Tool

Add this tool to your website for free: