Hello everyone , greetings!!

I am designing a board which contains tracks with current capacity as high as 80 Amps.

1)Is there a method which will help me to obtain correct track width using some track width calculator ?

2)If the track width is too large to accommodate in the PCB (say 1600 mils or 40 mm)how else can I implement such a high current track ?

3)Is it advisable to use copper wires on the unmasked copper tracks as the former has wider cross sectional area ?

Note : It is worth noting that the regular freeware tools available online for trace width/ conductor width calculation is applicable till 35 Amps. So we have to search for other options for higher rating currents.