It's impossible to give an exact number of symbols for hieroglyphics. This is because:
* The system was constantly evolving: New symbols were added over time, and some fell out of use.
* Variations existed: Different scribes used slightly different forms of the same symbol.
* Context mattered: The meaning of a symbol could change depending on its position in a word or phrase.
However, scholars estimate that there were around 700-800 distinct hieroglyphic symbols in common use during the peak of the Egyptian civilization.