Inani lamandla elitholakala ngokudla umkhiqizo wokudla linganqunywa ngezindlela ezimbili ezihlukene.
1. Indlela yekhalorimitha
Indlela yokuqala ukunquma inani lamandla kusetshenziswa ikhalorimitha yebhomu (Bomb calorimeter). Kule ndlela, isampula yokudla iyashiswa endaweni elawulwayo bese kukalwa inani lamandla akhishwayo.
2. Indlela yokubala
Indlela yesibili isekelwe ekubaleni. Ngokusebenzisa isizindalwazi oqinisekile ngokunemba kwaso (isibonelo isizindalwazi se-Nutrient Finder), ungabala inani lamandla elizonikezwa ukudla okukhulunywa ngakho.
Sikulungele ukubambisana nani ezidingweni zokubalwa kwezakhamzimba nokulungiselela amalebula okudla ahambisana nemithetho.