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Patient & Flow

ECMO Duration Calculator

Calculate total minutes from ECMO start to stop, including leap years, month changes and year changes.

Start & stop times

Formula details

Total min = (stop date and time − start date and time) in minutes

1 day = 1,440 min · 1 hour = 60 min

Gregorian calendar dates, including leap days and different month lengths. Use a 24-hour clock.

Enter both times in the same fixed time zone, such as Korea Standard Time (UTC+09:00). Daylight-saving clock changes are not applied.

Type digits only: 28022024 → 28/02/2024 and 0930 → 09:30. Completed fields move to the next input automatically.

ECMO start time
ECMO stop time

Inputs stay in this page and are not saved. Copy result includes the entered dates and times.

Calculated result

Enter the start and stop dates and times to calculate total minutes. Editing an input clears the previous result.

Calculation notes

Dates use DD/MM/YYYY and times use HH:MM (00:00–23:59). The stop time must be at or after the start time. Matching times give 0 min.

This calculates the full interval, without subtracting interruptions or recommending how long ECMO should continue. It uses the Gregorian calendar, not the lunar calendar.

U.S. Naval Observatory: Gregorian leap-year rules

Calculation version 1.0