12/3/2023 0 Comments Clock calculator![]() ![]() To convert the elapsed time into a total number of minutes, just multiply the elapsed hours by 60, then add the elapsed minutes to the resulting number.Ģ40 minutes + 45 minutes = 285 minutes Why Should You Use a Time CalculatorĪn Hour and Time Calculator is a very useful tool for anyone wondering “How many hours am I working?” ![]() Use the same number of elapsed hours and just replace the elapsed minutes with the decimal hour equivalent. Using the calculated elapsed time from our last example: The elapsed hours stay the same and don’t need any conversions. To convert the elapsed time into decimal hours, just divide the elapsed minutes by 60. But since the end time also falls on on the following day, we need to add 24 hours to the hours component to get an accurate number of total hours elapsed and make it work properly with the subsequent calculations.Ĭonverted end time hours = 2 hours - 1 hour + 24 hours = 25 hoursĮlapsed hours = 25 hours - 21 hours = 4 hoursĮlapsed time = 4:45 or 4 hours 45 minutes Since we took out and converted 1 hour from the end time hours, we end up with an end time hour of 1. The end time minutes is smaller than the start time minutes, so we need to remove 1 hour from the end time hours and add it to the end time minutes - otherwise, we’ll end up with a negative number.Ĭonverted end time minutes = 20 minutes + 60 minutes = 80 minutesĮlapsed minutes = 80 minutes - 35 minutes = 45 minutes If the end time falls on the following day but is less than 24 hours from the start time, here’s what you can do: Start time: 9:35 PM = 21:35Įnd time: 02:20 AM (of the following day) = 02:20 The methods for calculating elapsed times described above only work if the start and end times are recorded in the same day. Subtract 1 hour from the end time’s hours then add 60 minutes to the end time’s minutes.Ĭonverted end time hours = 13 hours - 1 hour = 12 hoursĮlapsed hours = 12 hours - 11 hours = 1 hourĬonverted end time minutes = 28 minutes + 60 minutes = 88 minutesĮlapsed minutes = 88 minutes - 47 minutes = 41 minutesĮlapsed time = 1:41 or 1 hour and 41 minutes When we add the extra 60 minutes to the end time minutes the total time elapsed remains the same and we’ll also end up with a positive number when we subtract the start time’s minutes.Ģ8 minutes - 47 minutes gives us -19 minutes which is not a valid time interval. We first need to remove 1 hour from the end time’s hours and then convert that into 60 minutes. If the end time’s minutes is smaller than the start time’s minutes, we’ll get a negative result - which is not a valid time or an accurate measure of the minutes component of the total interval/time duration. Now combine the resulting hours and minutes to get the total elapsed time.Įlapsed time = 9:15 or 9 hours and 15 minutes Do this separately for the hours and minutes.Įlapsed minutes = 30 minutes - 15 minutes = 15 minutesĮlapsed hours = 17 hours - 8 hours = 9 hours Then subtract the start time from the end time. To get the time interval, just subtract the start time from the end time, But we need to calculate the difference between the hours and minutes separately.įirst convert the recorded times to the 24-hour format. ![]() To do this, simply add 12 hours to any time recorded during the PM period. If you’re using the 12-hour or standard time format to record start and end times, you’ll need to convert the recorded times to the 24-hour format first. How to Calculate Elapsed Time and Time DurationĬalculating elapsed time is easier with the 24-hour format, aka military time and the format most used by Europeans.
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