H – Total hammers remaining in production
S – Game speed multipler – 0.66... = quick, 1.0 = normal, 1.5 = epic, 3.0 = marathon
Bonuses:
B – Sum of all production bonuses (eg. 0.5 if you have a forge and Organized Religion is applicable)
K – Kremlin Modifier – 0.67 for Kremlin, 1.0 otherwise
Penalties:
W – The wonder modifier – 2.0 for a world wonder, 1.5 for national wonder, 1.0 for everything else
(Anm.: Diese Pauschale Angabe ist falsch; hier bitte die Werte aus der Tabelle anwenden)
Z – Zero Hammers modifier – 1.5 if this is the first turn of production
Now, the formula for the modified cost of whatever it is you’re rushing ([…] denotes the “floor” operation)
C = [ H / ( 1+B) * K * W * Z ]
Basically, you just multiply everything together, divide by 1+B, and then take the floor.
Now, if you want to convert that cost into a population or gold quantity you simply use one of the two simple formulas below.
Pop Rush:
P = [ C / ( 30 * S) + 1 ]
Gold Rush:
G = 3 * C