Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Supply voltage (V)

RMS sinusoidal supply voltage.

Frequency (Hz)

Supply frequency in hertz.

Core area (cm²)

Core cross-sectional area in square centimeters.

Turns

Number of primary turns.

Estimate the peak core flux density in tesla with the transformer equation B = V * 10^4 / (4.44 * f * A * N) using a core area in square centimeters. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Flux density (T)

Peak flux density in the core.

• Transformer ratios and losses depend on waveform, frequency, core material and flux, turns, winding resistance, leakage, magnetizing current, load power factor, temperature, insulation, and construction. Ideal turns-ratio equations do not establish regulation or thermal rating.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Flux Density Tesla

  Compute flux density in teslas as magnetic flux in webers divided by area in square meters.

• Inductor Steinmetz Core Loss Density

  Estimate magnetic-core loss density with a fitted Steinmetz power law p=k f^α B^β. Units of k must match the selected frequency, peak flux-density, and desired output units; the model applies only over its fitted waveform/range.

• Magnetic Flux Wb

  Compute magnetic flux in webers as flux density in teslas multiplied by area in square meters.