Dipole total Length = Amount / frequency
Each leg of the dipole = Dipole Total Length / 2
Inverted Vees total length = ( Amount / Frequency ) * Percent
Each leg of the Inverted Vee = Inverted Vees total length / 2
Where,
Full Wave = 984
Half Wave = 468
Quarter Wave = 234
This tool will help you dynamically to calculate the total length of a dipole inverted V antenna.
Calculator 
Formula 
