Date Difference Calculator
Calculate the exact days, weeks, months, and business days between any two dates.
Calculate Exact Days and Time Between Two Dates
The Date Difference Calculator counts the precise duration between any start date and end date. Whether you need to calculate project deadlines, contract durations, vacation countdowns, or event intervals, this tool gives you instant totals in days, weeks, months, years, and total business days.
By default, the calculation measures the duration between the midnight start of your first date and the midnight start of your end date. Toggle "Include end day" if you wish to count the target date as a full active day.
Business Days & Workday Calculations
When managing projects or payroll, calendar days don't always match working days. Checking the Business Days Only option automatically subtracts Saturdays and Sundays from the total count, providing an exact tally of working days between your selected dates.
Frequently asked questions
- How does the Date Difference Calculator work?
- It calculates the time span between a start date and an end date, converting the difference into total days, weeks, months, years, hours, and business days.
- Does it account for leap years?
- Yes. The calculation uses native astronomical and calendar calculations that automatically account for leap years (including 366-day leap years).
- How do I calculate business days only?
- Simply check the "Exclude weekends" checkbox to filter out Saturdays and Sundays from the total day count.