How to calculate earning per day

How to calculate earning per day?

I try use some prime coin calculator and enter my chain as 0.15/d , it say I would make $3+ usd

But I check I don’t make that much coin a day.

0.15 9.87 days 0.94821769 XPM = 0.00379287 BTC = 3.57 USD

Is pool mining slower or this coin website calculator is wrong?

Anyone can tell me how to calculate earning of 0.15 chain per day on e.g beeerr pool

That seems to be right, but slightly depends on your luck. calculator just shows you the average value, based on yours ch/d. You can also easily calculate your earnings according to info on main page or just find detailed info on

PPS: what your CPU is?