Each Company has its own formula. Generally, it is (pcb size) * (layers/2) * (technology multipliers) + setup + fixed cost.
But the specific PCB Cost you need to give below information:
Board Quantity
Board size
Thickness
Layers
Copper Weight
Solder mask
Routing
Impedance Control
and another special request
Contact: Lillian Zhu
Phone: 008613928048496
Tel: 0755-28628518
Email: leappcb@163.com,sales@leappcb.com
Add: Hongtian industry,baoan area,shenzhen city,guangdong ,china