📅 Time Calculators

Age, date difference, countdowns, durations.

• 📅

  Age Calculator

  time

  Calculate exact age in years, months, and days from a birthdate.

  age = asOfDate − birthDate

  Calculate
• 📅

  Date Difference

  time

  Days, weeks, months, and years between two dates.

  days = (date2 − date1) / 86,400,000

  Calculate
• 📅

  Countdown

  time

  Days, hours, minutes, seconds until a target date.

  remainingDays = targetDate − today

  Calculate
• 📅

  Business Days

  time

  Number of business days (Mon–Fri) between two dates, excluding an optional holiday list.

  business days = total days − (weekends + holidays)

  Calculate
• 📅

  Time Duration

  time

  Convert between ms, seconds, minutes, hours, days, weeks, months, years.

  seconds = hours × 3600 + minutes × 60 + seconds

  Calculate