): For standard silicon steel (stampings), this is usually between A safe assumption for small power transformers is 2. Core Sizing and Area Calculation

"compensation factor" to the secondary turns to account for voltage drops under load). 4. Wire Gauge and Current Density

To make the tool user-friendly, organize your rows as follows: Excel Formula (Example) Power (VA) =B2*B3 (Secondary V * I) Core Core Area ( Accap A sub c =1.15*SQRT(B4) Windings Turns Per Volt =1/(4.44*10^-4*B5*B6*B7) Primary Primary Turns =B1*B8 Secondary Secondary Turns =(B2*B8)*1.05 (with 5% compensation) Check Window Space Factor =(Total Wire Area) / (Core Window Area) 6. Key Design Checks