| 1 | Fformiwla Pwysau Gwifren Copepr a Fformiwla Trosi hyd Enameled | L/kg | L1 = 143m/(d*d) |
| 2 | Pwysau gwifren hirsgwar a fformiwla trosi hyd | g/l | Z = (t*w-0.2146*t2)*8900*1000/1000000 |
| 3 | Ardal drawsdoriadol o wifren hirsgwar | mm2 | S = t*w-0.2146*t2 |
| 4 | Fformiwla trosi pwysau gwifren a hyd litz | L/kg | L2 = 274 / (d*d*2*llinynnau) |
| 5 | Gwrthiant gwifren hirsgwar | Ω/l | R = r*l1/s |
| 6 | Fformiwla 1: Gwrthiant Gwifren Litz | Ω/l | R20 = rt × α × 103/l3 |
| 7 | Fformiwla 2: Gwrthiant Gwifren Litz | Ω/l | R2 (ω/km) ≦ r × 1.03 ÷ s × ar × 1000 |
