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.

Turns

Required integer input.

Current (A)

Required number input.

Calculate magnetomotive force as winding turns × current in ampere-turns. The current sign determines field direction under the selected winding convention. 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]

Magnetomotive Force Ampere Turns

The resulting magnetomotive force ampere turns returned as a number.

• Inductor calculations depend on core material, air gap, turns, frequency, waveform, temperature, DC bias, copper resistance, skin and proximity effects, fringing, and saturation definition. Small-signal inductance and nominal current rating may not describe switching operation.
• 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.

• Current Sensor Output Voltage

  Calculate linear current-sensor output voltage from zero-current offset, volts-per-ampere sensitivity, and signed current.

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• Solenoid Force N

  Estimate the attraction force of a solenoid actuator from ampere-turns, gap, and pole area.