I am working on a Coding schools assignment for entrance. =)
I'm not sure of the exact amount, however there are a lot. You could review all of the lessons from all of the certs, however maybe someone from the core team will know better than me.
Ya Im on #77 and seems like its taking forever. lol
It's going to take a lot of time to complete everything, freeCodeCamp should be taking months at a minimum to complete and they are adding three more certs once beta becomes stable.