日期相差天數
計算兩個日期之間相差的確切天數、週數、月數或年數。
Days
Weeks
Months
Years
Business days (Mon–Fri)
How to use
- Pick a start date and an end date using the date pickers (they default to today and one week ahead).
- Read the difference in days, weeks, months, and years from the result cards.
- Check "Count business days only" to exclude weekends from the day count.
Related calculators
- Age Calculator — calculate exact age from a birth date
- Timezone Converter — find equivalent times across zones
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Date difference use cases
- Business Days Calculator — count Mon–Fri working days between dates
- Days Between Dates — calendar days, weeks, months, and years
常見問題
- Is this date calculator free?
- Yes, completely free with no account required. All calculations run in your browser.
- Does my data leave my device?
- No. Everything runs client-side in JavaScript. No dates are uploaded or stored.
- Does it work on mobile?
- Yes. The tool is mobile-first and works in Safari and Chrome on iOS and Android.
- What counts as a business day?
- The business-days mode counts Monday through Friday only, excluding Saturday and Sunday. Public holidays are not excluded — you will need to subtract those manually based on your country.
Last updated: By jarvisbox