I am interested in the revenue calculation of mining process. From a few references like this I found a equation that people say it's correct.

Unfortunatelly it differs to the results which are calculated by public available calculators like this

with a hasing power of 13.5 TH/s the referenced calculator and others resulting in 0.001304 BTC per day. The equation in the other thread results in 0.002134 BTC per day.

H = 13500 GH/s * 10^9 = 13,500,000,000,000
B = 12.5
D = 1,590,896,927,258

(86400 * 13,500,000,000,000 * 12.5) / (2^32 * 1,590,896,927,258) =
  0.002134 BTC/d

Could anybody please help me to understand whats the right way to calculate an approx. revenue?

Thanks in advance

I am interested in the revenue calculation of mining process. From a few references like this I found a equation that people say it's correct.

Unfortunatelly it differs to the results which are calculated by public available calculators like this.

with a hashing power of 13.5 TH/s the referenced calculator and others resulting in 0.001304 BTC per day. The equation in the other thread results in 0.002134 BTC per day.

H = 13500 GH/s * 10^9 = 13,500,000,000,000
B = 12.5
D = 1,590,896,927,258

(86400 * 13,500,000,000,000 * 12.5) / (2^32 * 1,590,896,927,258) =
  0.002134 BTC/d

Could anybody please help me to understand whats the right way to calculate an approx. revenue?

Thanks in advance