Ifomula yokuguqulwa phakathi kwejubane lokugeleza epayipini kanye nezinga lokugeleza:

Ifomula yokuguqulwa phakathi kwejubane lokugeleza epayipini kanye nezinga lokugeleza:
Izinga lokugeleza lilingana nendawo enqamula ipayipi ephindaphindwe ngejubane lokugeleza koketshezi.
Vumela izinga lokugeleza libe ngu-Q, ububanzi bangaphakathi bombhobho bube ngu-D, kanye nejubane lokugeleza koketshezi libe ngu-V. Bese u-Q = π(D/2)²×V.
Uma iyunithi ka-Q ingu-m³/h, iyunithi ka-D ingu-m, kanti iyunithi ka-V ingu-m/s:
Q = π(D/2)²×V×3600 = 2827×D²×V (m³/h).