Flowmeter (100) for dosing medical gases, comprising a main body (2) which has, defined therein, at least one flow supply path extending between an inlet (2) and an outlet (7); said flowmeter (100) comprising at least one flow regulation stage (5) which allows continuous variation of the flowrate of the medical gas supplied at the outlet (7), at least one flowrate measuring device (6) arranged downstream of said flow regulation stage (4); and at least one pressure stabilization stage (4) arranged so as to intercept said flow supply path upstream of the flow regulation stage (5).