text: is matter converted into energy in a black hole? matter does not just disappear.  something is happening to it. none of us posting here will be able to tell you the answer here with any certanty, but the theory that i'd most redaly accept would be that no it does not.  all matter entering a black hole is compressed incredibly in to a very (cosmically speaking) small amount of space.  this pressure and proximity cause a huge build up of energy, but the matter is not lost.  also the incredible amount of matter in that space creates large gravatational fields.  if the matter was converted into energy the hole would lose its power to capture more matter.