Date Difference Calculator
Days, business days, weeks, months, years between any two dates. Y/M/D breakdown.
published
- [FREE]
- [NO_SIGNUP]
- [NO_UPLOAD]
A date difference calculator measures the span between two dates in every unit you might want — calendar Y/M/D, total days, business days, weeks, months, hours, minutes, seconds.
Privacy
Pure JS. No upload.
Frequently asked questions
What does inclusive mean?
When ON, both endpoints count. From Jan 1 to Jan 3 inclusive = 3 days. When OFF, only the span between counts — 2 days. Common scenario: counting how many days an event lasts (inclusive) vs how long ago something happened (exclusive).
How are business days counted?
Monday through Friday inside the range. Holidays are not deducted — this is a calendar calculation, not a per-country payroll one.
Y/M/D vs total months?
Y/M/D is the calendar breakdown ("6 years, 3 months, 29 days"). Total months is the same span flattened to months ("75 months"). Useful for different contexts.
Privacy?
Pure JS Date math. No upload.