Minecraft wiki entry for Block_of_Netherite, associated text: A single block of netherite is made from 9 netherite ingots, each composes of 4 netherite scraps and 4 gold ingots. Therefore, a block of netherite is made of 36 pieces of ancient debris and 36 gold ingots.
To construct a beacon pyramid consisting entirely of blocks of netherite, a total of 5904 pieces of ancient debris are needed, which is 92 1⁄4 stacks, capable of filling almost three and a half shulker boxes.