Xisaabinta isku-darka walxaha la hagaajiyay ee birta dhalaalaysa ee foornada dhalaalidda induction:

gt=Gz(Xa-Xb)/Cd(kg)

gt -Ku darista qadarka C-kordhinta wakiilka ama alloys kale (kg)

Gz – Wadarta miisaanka birta dhalada ee foornada (kg)

Xa- bartilmaameedka ah ee ka kooban birta dhalaalaysa (%)

Xb -Qiimaha falanqaynta ee ka samaysan birta dhalada ee foornada (%)

Wakiilka CC-kordhinta ama waxyaabaha kale ee daawaha (%)

d-Heerka nuugista maaddooyinka firfircoon (100% waa 1)

Birta dhalaalaysa ee C iyo SI waxay ka badan yihiin halabuurka la beegsanayo, ku dar qashinka si loo yareeyo C, xisaabinta SI gt=Gz(Xb-Xa)/b

b- waxa ku jira curiyaha la hagaajiyay ee qashinka

Xogta la taaban karo waa: ku dar 34kg qashinka birta/t, yaree 0.1% C oo yaree 0.05% Si