I've mined on NiceHash for a couple years off and on, and currently have 6 P104-100's and a 1060 mining for me.  According to the calculator I should be getting around $24 a day.  In reality, my payouts to my NH wallet are right about $10 a day.  I believe it is taking into account my electric cost, but even so, it's guess as to what I should be earning is WAY off.

All 7 GPUs are always mining BeamV3 through NHMiner 36.1. 

Is it the miner program and algorithm affecting my profits, or is the calculator just plain wrong?