I'm not talking about mining calculators.
Really ?

then sorry i misunderstand your questions

so then its not your key questions .. i got it .. language barrier right ?

Im deeply apologize for my mistake , i really thought you are asking question about mining calculators, when you typing " mining calculators " My Bad..Sorry

The key questions to help newbies, that doesn't let them to lose money on risky investments:
- What is the error margin of some mining calculators? What is the best ones of them and why they are created? What is the purpose of the fair mining calculators?
Thats for people like you ... Thats the way someone can help newbies so they "doesn't let them to lose money on risky investments "
My suggestion for you is read one of my other "funny" post, so you can see some numbers

There you can see how things changing in this crypto word within a day
Antminer E3 vs Innosilicon ETH Master (485 MH/s) updated a day later 