Transverse · Diatonic Major

Flute Hole Layout

Enter the length of your pipe and this scales the master blueprint to your flute, telling you where to drill each finger hole — measured from the open foot end, in inches.

Your flute length

Blow-hole center → foot (open) end — e.g. 20 1/16 or 20.0625

inches

Base note — the all-closed note at the foot; the scale climbs from here toward the blow hole

Tube diameter (bore) — the blow hole sits one bore Ø from the stop (the closed end)

Scale finger-hole sizes with length

Drill map

Drill holes under-size first and open them up to tune by ear — different tube materials each behave a little differently.