Wilmall Transformer Tools
Low-voltage transformer calculation tools for practical product selection.
Built by an actual transformer factory. Use our calculators to size the right model, check country voltage, or convert VA and watts - then send your spec for a custom quote within 24 hours.
Electrical calculators
3 free transformer calculators
Pick the calculator that matches your problem - no signup, no download.
All
Step Up / Down
Variable
Reference
Step Up / Down
Transformer Sizing Calculator
Enter appliance wattage and load type - get the recommended VA rating and exact model in seconds.
Open calculator
Reference
Voltage by Country
Look up voltage, frequency and plug type for any country - and whether your appliance needs a converter.
Open calculator
Reference
VA to Watts Converter
Convert between VA and watts with power factor - then size the right transformer for the load.
Open calculator
Need help beyond a calculator?
Get a Free Quote
Tell us your appliance, voltage and quantity - we reply within 24 hours with a factory-direct quote.