Date Calculator
Find the exact difference between two dates in years, months, days, and business days.
How this is calculated
Calendar arithmetic between two dates. Business days exclude weekends.
Frequently Asked Questions About Date Calculator
A date calculator finds the exact time difference between two dates, expressed in years, months, days, weeks, and business days.
How is the difference between two dates calculated?
Simply subtract the start date from the end date. The calculator shows the difference in multiple formats: total days, years, months, weeks, and business days. This gives you different perspectives on the time span.
What are business days and why do they matter?
Business days are weekdays (Monday-Friday), excluding weekends and holidays. They matter for work projects, deadlines, and scheduling. A 7-day span might include only 5 business days. This calculator excludes weekends automatically.
Can I use this to calculate age?
Yes, you can calculate age by entering your birth date as the start and today's date as the end. The calculator shows exact age in years, months, and days. For a dedicated age calculator with additional features, use the age calculator instead.
How does the calculator handle leap years?
The calculator accounts for leap years automatically. If a date range includes February 29, it's counted correctly. This ensures accurate day counts across multiple years.
How many weeks are in a specific date range?
The calculator shows total weeks by dividing total days by 7. For example, 365 days = 52.14 weeks. This is useful for project planning, pregnancy tracking, or understanding durations in weekly terms.
What if the end date is before the start date?
Some calculators show negative values (representing days in the past), while others automatically swap the dates. Check your calculator's behavior. Regardless, you get the time span between the two dates.