Time Clock Calculator

  • Hours and Minutes to Decimal Calculator
    Convert hours and minutes into decimal hours instantly. Enter time like 8h 30m to get 8.5 decimal hours for payroll, timesheets, and billing.
  • What Time Will It Be in X Hours?
    Find out what time it will be in X hours from any start time. Enter a start time and number of hours to get the result in 24-hour HH:MM format.
  • Add or Subtract Hours from a Time Calculator
    Add or subtract hours from any start time and get the resulting clock time. Wraps correctly past midnight using a 24-hour, mod-1440 calculation.
  • Clock Angle Calculator
    Calculate the angle between the hour and minute hands of a clock at any time using the formula |30H − 5.5M|. Instant, accurate, with reflex angle.
  • 24-Hour to 12-Hour Time Converter
    Convert 24-hour (military) time to 12-hour format with AM/PM instantly. Enter the hour and minute to get the correct standard clock time.
  • Shift Length Calculator
    Calculate how many hours you worked in a shift from start and end times minus your unpaid break. Handles overnight shifts that cross midnight.
  • Minutes to Hours and Minutes Converter
    Convert total minutes into hours and minutes instantly. Enter any number of minutes to see the equivalent hours, remaining minutes, and decimal hours.
  • Hours, Minutes & Seconds Addition and Subtraction Calculator
    Add and subtract up to five time durations in hours, minutes and seconds, with a repeat multiplier. Get a normalized H:M:S total plus decimal hours, minutes and seconds.
  • Seconds to HH:MM:SS Calculator
    Convert any number of seconds into hours, minutes, and seconds (HH:MM:SS) instantly. Free, accurate seconds-to-time converter with full breakdown.
  • Timesheet Rounding Calculator
    Round timesheet hours to the nearest 5, 6, 10, 15, 30, or 60 minutes and convert to decimal hours for accurate payroll calculations.
  • BPM to Milliseconds Calculator
    Convert BPM (beats per minute) to milliseconds per beat. Get exact delay and note durations for whole, half, quarter, eighth and triplet notes.
  • Alarm Time Calculator
    Find what time to set your alarm. Add bedtime, time to fall asleep, and desired sleep hours to get your exact 24-hour wake-up time.
  • PTO Accrual Calculator
    Calculate accrued PTO (paid time off) from hours worked, hours per full period, and PTO earned per period. Get hours, days, and accrual rate.
  • Hours Worked Calculator
    Free hours worked calculator. Enter clock in and clock out times plus break minutes to get total hours worked in decimal and hours-and-minutes format.
  • Hours Until a Given Time Calculator
    Find how many hours and minutes remain until a given time of day. Enter the current time and target time to get the countdown on a 24-hour cycle.
  • Weekly Hours Worked Calculator
    Add up your weekly work hours from daily clock-in and clock-out times, minus unpaid breaks. See total hours, daily average, and overtime over 40h.
  • Overtime Pay Hours Calculator
    Calculate weekly overtime and regular pay from total hours worked. Splits hours at 40, applies time-and-a-half (1.5×) overtime per US FLSA rules.
  • Military Time Converter & Payroll Decimal Minutes Calculator
    Convert military (24-hour) time to regular 12-hour AM/PM time and back, and turn clock minutes into payroll decimal minutes (fractions of an hour) instantly.
  • Military Time Converter
    Convert between 12-hour regular time (am/pm) and 24-hour military time. See regular, military "hours", and 24-hour colon formats instantly.
  • Time Clock Calculator (Clock-In / Clock-Out)
    Free time clock calculator. Enter clock-in and clock-out times for each work period and get your Total Time in hours:minutes plus decimal hours.
  • Stopwatch Timer Calculator - Add & Subtract Lap Times
    Add or subtract stopwatch lap times in mm:ss.s like an adding machine. Keeps a running total that rolls into hours. Perfect for race splits and lap sums.
  • Time to Decimal Calculator
    Convert hh:mm:ss duration into decimal hours, decimal minutes, and total seconds. Free time-to-decimal calculator with step-by-step conversion.
  • Weekly Work Hours Time Card Calculator
    Free weekly time card calculator. Add daily start and end times plus unpaid breaks to get total work hours in hh:mm and decimal for payroll.
  • Time Arithmetic Calculator
    Add, subtract, multiply, or divide spans of time in days, hours, minutes and seconds. Get a normalized result or a unitless time ratio instantly.

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