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Calculate energy stored in an inductor using inductance, current, magnetic field energy, coil parameters, and electrical characteristics for power electronics and magnetic circuit design.
Switching Converter
Use this calculator to estimate energy stored in buck, boost and flyback inductor current.
Pulse Circuit
Useful for checking magnetic energy in coils, solenoids and pulsed inductive loads.
Corrected SVG diagram: coil turns wrap behind the core and return to the front like a real solenoid.
This calculator estimates stored energy from inductance and current using the standard inductor energy formula.
An inductor stores energy in its magnetic field when current flows through it. This stored energy is important in switching power supplies, solenoids, pulse circuits, relay coils, ignition coils, boost converters and flyback transformers. Since the formula uses current squared, increasing current has a much stronger effect than increasing inductance by the same ratio.
It is energy stored in the magnetic field of an inductor when current flows through it.
The calculator uses Energy = I² × L / 2.
Microhenry is common for power inductors, RF coils and converter inductors.
Current is squared in the formula, so doubling current gives four times the energy.
No. This is an ideal energy calculation and does not include core saturation or losses.
The result is shown in microjoules.
Inductor Stored Energy Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.