When to use this calculator
Find ideal inductor voltage from the rate of current change. Uses the passive sign convention and an ideal constant inductance.
Explore the dc circuits & components calculators for other questions in this topic. For a related calculation, use the Inverter Input Current Calculator: Estimate inverter DC current from output load and assumed efficiency.
PUTTING IT INTO PRACTICE
Inductor Voltage: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Inductance (mH) | 100 |
| Current rate of change (A/s) | 20 |
| Result | 2 V |
- Check the input labels and enter the example values above.
- Apply the relationship: Voltage = inductance in henries × current rate of change.
- The result is 2 V, rounded for display.
How to interpret your result
Uses the passive sign convention and an ideal constant inductance.
Ideal component models omit tolerances, heat and parasitic effects. Distinguish nominal energy from usable energy for batteries. Component ratings and installation requirements need separate manufacturer and design checks.
Frequently asked questions
Can these calculations select a safe installation rating?
No. They explain ideal relationships and do not include every thermal, protective or regulatory requirement.
When is the inductor voltage calculator useful?
Find ideal inductor voltage from the rate of current change. Uses the passive sign convention and an ideal constant inductance.
How do I use the inductor voltage calculator?
Enter inductance (mh), current rate of change (a/s). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Voltage = inductance in henries × current rate of change.
What should I check before using the result?
Uses the passive sign convention and an ideal constant inductance.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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