Electronic Components
Inductor Energy Calculator
This calculator evaluates stored magnetic energy for a single electronic components scenario. It uses inductance and current and shows the equation behind the displayed value.
Calculate Stored magnetic energy
Do not mix values recorded under different conditions.
Input notes
Use data-sheet values at the intended voltage, current, frequency, and temperature. Do not combine a worst-case value with unrelated nominal data.
Convert units once, retain the original reading, and verify the converted magnitude. For the companion stored energy calculation, open Amp-Hour Watt-Hour Calculator.
- Inductance
- Default example: 0.05 H. Enter inductance in H.
- Current
- Default example: 8 A. Enter current in A.
Formula used on this page
Here, Stored magnetic energy is obtained from E = ½LI². Its variables correspond to Inductance and Current.
The initial scenario returns 1.60 J. Re-enter field data before using the answer in a design or comparison.
Calculate stored magnetic energy from inductance and current. For a downstream stored energy value, open Capacitor Energy Calculator.
Applying the result
The calculated Stored magnetic energy is meaningful only with its input conditions attached. Compare it with voltage rating, current rating, dissipation, tolerance, and transient stress.
Label alternate cases rather than overwriting the baseline.
Transferring the result
Archive inductance and current with stored magnetic energy. Identify the instrument, rating, or assumption behind each entry.
Transfer stored magnetic energy before applying any display rounding. Keep a separate displayed value if reporting precision differs.
Assumptions and limitations
Core saturation limits usable energy.
The arithmetic intentionally leaves out pulse ratings, frequency behavior, package temperature, and layout. Do not hide omitted behavior inside an unexplained correction factor.
Use data-sheet values at the intended voltage, current, frequency, and temperature.
Questions about Inductor Energy
What should remain fixed in an alternate case?
Change one uncertain entry at a time and preserve the baseline. Use data-sheet values at the intended voltage, current, frequency, and temperature.
Does Inductor Energy Calculator choose a final rating?
Use the number as one check, then review minimum, nominal, and worst-case component values.
Should intermediate values be rounded?
Do not round between dependent calculations. Match the final display to the precision of the source data.
Should a blank measurement be entered as zero?
Check the field definition: some quantities can be zero, while others represent positive ratings or dimensions.
Which source values should I use for Stored magnetic energy?
Measured and rated values can represent different states. Keep nominal component markings separate from measured operating values.
What is not captured by this equation?
Core saturation limits usable energy. Also consider bias dependence, ESR, leakage, saturation, and self-heating.