What is the SI unit of latent heat? Share with your friends Share 0 Ajay answered this Hi Ayushi! The SI unit of Latent heat of fusion and vaporization are Jkg-1 Cheers!! 4 View Full Answer shoaibqadian... answered this jkg-1 0 shoaibqadian... answered this gkjk 0 prathmeshdeshpande98... answered this The unit of Latent heat is J/KG 0 rudeshpande answered this we know ! 0 rudeshpande answered this Q = ml => L = Q/m = J/kg (or) J kg-1 0 Gautham Madhukumar answered this Jkg-1 0