Duration Calculator

  • Marathon Pace Calculator
    Calculate your required marathon pace per mile and per kilometer from your goal finish time. Free, fast marathon pace calculator for runners.
  • Hiking Time Calculator
    Estimate how long a hike will take using Naismith's Rule: time from distance, walking speed, and total ascent. Free, instant trek planning tool.
  • Hours and Minutes Add/Subtract Calculator
    Add and subtract multiple time durations in hours and minutes, each repeatable a set number of times. Get the total as hours+minutes, decimal hours, and minutes.
  • Walking Time from Distance Calculator
    Convert a walking distance to minutes on foot using Japan's 80 m/min real-estate standard. Adjustable speed and units, precise to the second.
  • Walking Time to Distance Calculator
    Convert "X minutes on foot" from Japanese property listings into walking distance in meters and km, using the standard 80 m/min advertising rate.
  • Years to Decades Calculator
    Convert years to decades instantly. Enter any number of years and get the equivalent in decades using the simple formula decades = years ÷ 10.
  • Business Days Calculator
    Calculate the number of business (working) days between two dates. Excludes Saturdays, Sundays and a custom number of public holidays.
  • Days to Months Calculator
    Convert days to months instantly. Enter any number of days and get the equivalent months using the average 30.4375 days per month.
  • Days to Weeks Calculator
    Convert days to weeks instantly. Enter any number of days to get the exact number of weeks, plus whole weeks and remaining days. Free time unit converter.
  • Days to Years Calculator
    Convert any number of days into years instantly. Uses 365.25 days per year to account for leap years. Free, fast, and accurate days-to-years converter.
  • Hours to Days Calculator
    Convert hours to days instantly. Enter any number of hours and get the equivalent number of days using days = hours ÷ 24.
  • Minutes to Decimal Calculator
    Convert minutes to decimal hours instantly. Divide minutes by 60 to get decimal hours for timesheets, payroll, and billing.
  • Months to Years Calculator
    Convert months to years instantly. Enter a number of months and get the result in decimal years plus whole years and remaining months.
  • Minutes to Days Calculator
    Convert minutes to days instantly. Enter any number of minutes to see the equivalent in days (and hours) using days = minutes ÷ 1440.
  • Weeks to Months Calculator
    Convert weeks to months instantly. Enter the number of weeks and get the equivalent in months using the average 4.34524 weeks per month.
  • Date Plus Weeks Calculator
    Add or subtract weeks to any date and get the resulting calendar date and day of week. Handles leap years; optional Japanese-era year input.
  • Travel Time Between Two Cities Calculator (with Time Zones)
    Calculate the true elapsed travel time between two cities in different time zones. Enter local departure and arrival times plus each city's UTC offset (DST aware).
  • Elapsed Days and Time Between Two Date-Times
    Calculate the elapsed days and time between two date-times (end minus start). Get weeks, days, hours, minutes, seconds, and an H:M:S breakdown instantly.
  • Date-Time Plus Elapsed Time Calculator
    Add or subtract days, hours, minutes and seconds from a start date-time. Get the resulting Gregorian date, time and day of the week instantly.
  • Time Spent on Email Calculator
    Estimate how many hours you spend on email. Enter emails per day, minutes per email, and working days to see total hours, days, and workdays.
  • English Learning Time Calculator
    Estimate how many weeks and months you need to learn English. Enter your current and target CEFR level plus weekly study hours.
  • Day of the Year Calculator
    Find out which day of the year a given date is (1-366). Calculate the ordinal day number, days remaining, and total days, with full leap-year support.
  • Minute Calculator
    Calculate the total number of minutes between a start and end time. Get the result in minutes, decimal hours, and hours & minutes instantly.
  • Subtract Time Calculator
    Subtract hours, minutes and seconds from a start time. Get the resulting clock time in 24-hour format, wrapped correctly across midnight.

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