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Date Difference Calculator

Find the exact duration between any two dates in years, months, and days, alongside total calendar days and weekday totals.

Chronological span & weekday breakdown.
Date difference

Weekday count excludes Saturday and Sunday.

Worked Example — December 4, 2023 to February 9, 2026

2 years, 2 months, 5 days798 total days · 114 weeks

Common Mistakes to Avoid

  • Total days isn't the same as years × 365. Leap years and varying month lengths mean a simple years-times-365 estimate drifts from the real day count — this calculator counts the actual calendar days between the two dates.
  • This isn't for spreadsheet formulas. If you need a DATEDIF or date-difference formula inside Excel, Google Sheets, or SQL itself, that's a different task than using a standalone calculator — this page computes the result directly, it doesn't generate formula syntax.

References

  • Gregorian calendar (ISO 8601)

Last reviewed July 2026

Why Calculate Date Differences?

  • Precise day, month, and year counts with leap-year awareness
  • Counts actual weekdays vs weekends across your selected span
  • Total days and weeks equivalent conversions
  • Handles any historical or future date within 200 years
  • Instant calculation with zero data leaving your browser

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