Formula Computationis Datorum
| 1 | Formula conversionis ponderis et longitudinis filorum Copepr inauratorum | L/KG | L1=143M/(D*D) |
| 2 | Formula conversionis ponderis et longitudinis filorum rectangularium | g/L | Z = (T*W - 0.2146*T²)*8900*1000/1000000 |
| 3 | Area sectionis transversalis filorum rectangularium | mm² | S = T*W - 0.2146*T² |
| 4 | Formula conversionis ponderis et longitudinis fili Litziani | L/KG | L2=274 / (D*D*2*Fila) |
| 5 | Resistentia fili rectangularis | Ω/L | R = r * L1/S |
| 6 | Formula 1: Resistentia Fili Litziani | Ω/L | R²⁻=Rt ×α×10³/L³ |
| 7 | Formula II: Resistentia Fili Litziani | Ω/L | R2(Ω/Km)≦ r×1.03 s×at×1000 |
| L1 | Longitudo (M) | R1 | Resistentia (Ω/m) |
| L2 | Longitudo (M/KG) | r | 0.00000001724Ω*㎡/m |
| L3 | Longitudo (KM) | R20 | Resistentia conductoris per 1km ad 20°C (Ω/km) |
| M | Pondus (KG) | Rt | Resistentia ad t°C (Ω) |
| D | Diameter (mm) | αt | Coefficiens Temperaturae |
| Z | Pondus (g/m) | R2 | Resistentia (Ω/Km) |
| T | Crassitudo (mm) | r | Resistentia unius metri fili aenei smaltati |
| W | Latitudo (mm) | s | Fila (unitates) |
| S | Area sectionis transversalis (mm2) |
