Duration Calculator

  • Video Playback Speed Time Calculator
    Find out how long a video takes to watch at 1.25x, 1.5x, 2x or any speed. Enter the length and speed to see your watch time and time saved.
  • Years to Days Calculator
    Convert years to days instantly. Enter any number of years and get the equivalent days using the 365.25-day average year (accounts for leap years).
  • Weeks Between Dates Calculator
    Calculate the exact number of weeks and days between two dates. Enter a start and end date to get total weeks, remainder days, and decimal weeks.
  • Days Ago Calculator
    Find out what date it was N days ago. Enter the number of days and get the exact past date, weekday, and ISO format instantly.
  • Intermittent Fasting Time Calculator
    Calculate when your fast ends and your eating window opens and closes based on your last meal and chosen fasting schedule like 16:8 or 18:6.
  • Half-Life Time Calculator
    Calculate the time required for a substance to decay from an initial quantity to a remaining amount using its half-life and the decay formula.
  • Time and a Half Calculator
    Calculate time and a half overtime pay. Enter your hourly rate, regular hours, and overtime hours to see your 1.5× overtime rate and total pay.
  • Hours to Seconds Calculator
    Convert hours to seconds instantly. Enter any number of hours and get the exact equivalent in seconds using seconds = hours × 3600.
  • Fortnight to Hours Calculator
    Convert days into total hours instantly. Enter days plus optional extra hours to get the exact number of hours and minutes using Hours = days × 24.
  • Countdown to Date Calculator
    Countdown to any date and time. See the exact days, hours, minutes and seconds remaining — or how long ago a past date occurred.
  • Countdown to New Year Calculator
    Find out exactly how many days, hours, minutes and seconds remain until January 1 of next year from any chosen date and time.
  • Meeting Time Across Time Zones Calculator
    Convert a meeting time from one city to another using UTC offsets. Instantly see the local time in City B and whether it falls on a different day.
  • Seconds to Hours Calculator
    Convert seconds to hours instantly. Enter any number of seconds and get the exact hours (and minutes) using hours = seconds ÷ 3600.
  • Minutes to Seconds Calculator
    Convert minutes to seconds instantly. Enter any number of minutes and get the exact equivalent in seconds using seconds = minutes × 60.
  • Days Until Christmas Calculator
    Find out how many days until Christmas (December 25). Enter any start date for an instant countdown showing days and weeks until the holiday.
  • Work Hours Calculator with Lunch Break
    Calculate net work hours from clock-in and clock-out times after subtracting your lunch break. Supports overnight shifts. Free and instant.
  • Time Ago Calculator
    Calculate how long ago a date and time was, broken into years, months, days, hours and minutes — or count time until a future moment.
  • Seconds to Minutes Calculator
    Convert seconds to minutes instantly. Enter any number of seconds and get the exact minutes (seconds ÷ 60) plus a minutes-and-seconds breakdown.
  • Days to Hours Calculator
    Convert days to hours instantly with this free Days to Hours Calculator. Enter any number of days and get the exact total hours using hours = days × 24.
  • Weeks to Days Calculator
    Convert weeks to days instantly. Enter any number of weeks and get the exact equivalent in days using the formula days = weeks × 7.
  • Days From a Date Calculator
    Add or subtract any number of days from a date. Find the exact resulting calendar date and day of the week, with leap years handled automatically.
  • Add Years to a Date Calculator
    Add (or subtract) years to any date instantly. Find the exact future or past date, with automatic Feb 29 to Feb 28 leap-year adjustment.
  • Speech Time Calculator
    Convert word count to speaking time. Estimate how many minutes your speech or presentation will take at your chosen words-per-minute pace.
  • Layover / Connection Time Calculator
    Calculate your flight layover or connection time in minutes between arrival and next departure, and check if it beats the minimum connection time.

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