How Long Does It Take To Tune A Piano?
A brand new piano that has been played frequently and is in a stable environment (regulated temperature), would only need one to two hours to be tuned (MAX).
The time it would take for a used piano that has not been tuned regularly, might require around two to four hours or (mostly) additional visits.
If a piano has been consistently played and is in a poorly temperature controlled location, would require more time since more strings are prone to going out of tune.
What Is A A440 Piano Tuning?
A440, also known as A4 and Stuttgart Pitch, is the musical pitch that serves as the audio frequency of 440Hz. This is the tuning standard for the key of A that is above Middle C.