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Voltage Regulation Calculator
Compute the regulation of a power supply or transformer from no-load and full-load voltage.
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Regulation
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Compute the regulation of a power supply or transformer from no-load and full-load voltage.
Voltage Regulation Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Regulation % = (V no-load – V full-load) / V full-load x 100.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Voltage Quick Guide
Typical values for reference.
| No-load V | Full-load V | Current | Regulation |
|---|---|---|---|
| 12.2 | 12 | 10 | 1.67% |
| 12.6 | 11.9 | 10 | 5.88% |
| 13.2 | 11.5 | 10 | 14.78% |
| 14.4 | 11 | 10 | 30.91% |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Voltage Regulation Calculator FAQ
Answers to common questions about this calculator.
How much output voltage changes between no load and full load.
Under 5 percent for many supplies.
Source resistance and reactance.
Yes.