Transformer Current Calculator
Find transformer current from its kVA rating and voltage.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Transformer Current Calculator
How to use this tool
- Enter the values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
A single-phase 50 kVA transformer at 230 V draws 50 × 1000 / 230 = 217.39 A.
What this tool does not do / Limits
This is an estimate assuming rated load at the stated voltage. It is not a substitute for the transformer datasheet or a qualified electrician, and it ignores losses, inrush current, and power factor.
Frequently asked questions
Why does three-phase give a lower current?
Three-phase power spreads across three lines, so the same kVA at the same line voltage needs less current per line.
Is this the current at full load?
Yes, at the full kVA rating. A lightly loaded transformer draws less.
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