Hi Margot,

Yes, you will need two formulas. Insert for example into cells A1:D4:

A 4,91 A 4,91
C 0,61 C 0,61
Q 41,6 h 10
h =(B3/(8,025*B1*B2))^2 Q =8,025*D1*D2*D3^0,5


(use "." instead of my "," - I am sitting at a German version here)

HTH,
Bernd