How tall is Zac Efron? This image appears in the gallery:Zac Efron: Age, Height, Instagram & Dating Details Of 'Down To Earth' Star 2. How tall is Zac Efron? Zac stands at 1.73 metres tall, or 5ft6 inches. Instagram @zacefron/ PA 7 images See the full gallery: Zac Efron: Age, Height, Instagram & Dating Details Of 'Down To Earth' Star