The hour and minute calculator allows operations to be performed by mixing hours and minutes. It is for example possible to make a calculation like 3H20 + 254M and to have the result in minutes (454) and in hours (7h30).
In the calculator, the hours must be entered with a separation H 3H or 3H00 are identical.
The M allows to indicate a value in minute but is not obligatory 254M or 254 is identical.
