Time Clock Calculator

  • 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.
  • Monthly Salary to Hourly Rate Calculator
    Convert your monthly salary to an hourly rate instantly. Enter your monthly pay and weekly hours to see your equivalent hourly wage, annual salary, and weekly pay.
  • 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.
  • Working Hours Between Two Times Calculator
    Calculate net working hours between a start and end time, deducting break minutes. Supports overnight shifts and shows hours and minutes.
  • 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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