Chartixo
Calculators

Date Difference Calculator

Calculate the exact number of calendar days, business days, and weekends between two dates.

Total Calendar Duration
86 Days

Equivalent to 12 weeks and 2 days

Working Business Days
62 Days

Mon–Fri working days

Weekend Days
24 Days

Saturdays and Sundays

Total Elapsed Hours
2,064 Hrs

24 hours per day

Runs 100% locally in your browser. Zero data transmission.

How It Works & Underlying Concept

Determining the duration between two dates is essential for contract deadlines, sprint planning, project milestones, and legal notice periods. Business day calculations filter out standard non-working weekend days to provide realistic project timeframes.

Mathematical Formula / RuleCalendar Days = (EndDate - StartDate) in ms / 86,400,000; Business Days = Count of days where DayOfWeek ∉ {0, 6}
Quick Instructions
1Pick your start date and end date from the date selectors.
2Check the box if you wish to include the end date in the total count.
3Examine the breakdown of calendar days vs. actual business working days.

Key Capabilities

  • Total calendar days, weeks, and remaining days
  • Automatic business day counting (excludes Saturdays & Sundays)
  • Option to include or exclude the ending date
  • Total elapsed hours calculation
Real-World Example

Project Delivery Timeline

A software project starts on Monday, October 5, 2026 and must be delivered by Friday, October 30, 2026.

Step 1:Select October 5, 2026 as the start date.
Step 2:Select October 30, 2026 as the end date.
Step 3:Enable 'Include end date'.
Result: 26 total calendar days comprising 20 business working days and 6 weekend days.
Technical Notes & Limits
  • Does not automatically account for localized public holidays (only standard weekend days).

Frequently Asked Questions

Does this calculator account for leap years?▾
Yes, leap year days (February 29) are fully factored into the calendar calculation.
Can I enter dates in reverse order?▾
Yes, if the end date is earlier than the start date, the calculator indicates a negative elapsed duration.

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