So, I dont know if this has been done before, but I found a way to calculate how much health does one healthbar contain in numbers. All you need for this is a friend, a faust and some effort. Basicly the idea is to count how much of your damage backfires when youre cursed and then do the calculations using that percentige, the damage dealt in numbers and the backfire received in healthbars. So, first you need to know the percentige of damage backfiring from curse. This is done by going to lockdown with a friend. First you hit the friend and he tells you how many bars of hp he lost ( for an example 10 ). Then you charge your faust and curse yourself, then you swing the air and see how many healthbars you lost ( for an example 7 and a half ). From this you can calculate the backfire percentige ( 75% ). Then you just have to go hit some poor enemy while cursed to see how much damage the enemy takes and how many healthbars you lose. Then you take the according percentige of the damage you caused ( 75% in this case ) and divide it with the amount of half healthbars lost. And there you have the amount of health in a half healthbar, that times two is a whole bar.
The first useful use for this I can think is calculating monsters health in bars and calculating their damage in numbers.
Sorry for any typos, I wrote this on my phone... And please tell me if I missed something.
I forgot to mention that I havent been able to test this myself, since I dont have a faust, since im a 3* noobcake :)