How it works
Secondary turns = primary turns × secondary voltage ÷ primary voltage.
Input definitions
- Primary voltage
- Enter the value in the labeled unit.
- Secondary voltage
- Enter the value in the labeled unit.
- Primary turns
- Enter the value in the labeled unit.
A worked example
- Primary voltage
- 480
- Secondary voltage
- 120
- Primary turns
- 800
Assumptions & limits
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-19. Content checked against the stated method and examples. Our verification approach.
Report an issue with this tool or suggest an improvement ↗
Common questions
Does the ideal ratio include losses?
No. Winding resistance, leakage, regulation and core losses change loaded voltage.
How does Transformer turns and voltage ratio calculate the result?
Secondary turns = primary turns × secondary voltage ÷ primary voltage.
What should I verify before using Transformer turns and voltage ratio?
Uses only the values entered. Rates are illustrative inputs, not live quotes, legal rules or personalised advice. Check provider terms, local requirements and measurements before acting.