Transformer Turns Ratio Calculator
Calculate transformer turns ratio with clear inputs, formula guidance, and practical result checks.
Transformer Turns Ratio measurements
Enter your values, then calculate.
Result
How to calculate transformer turns ratio
This calculator finds transformer turns ratio by dividing primary winding turns by secondary winding turns — which directly determines the voltage transformation ratio.
How the calculation works
Turns ratio = Primary turns ÷ Secondary turns.
Example
A transformer with 400 primary turns and 40 secondary turns: 400÷40 = 10.
Frequently asked questions
How is Result calculated?
Result = [Primary turns] ÷ [Secondary turns].
Is the Transformer Turns Ratio Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Transformer Turns Ratio Calculator
Turns ratio = Primary turns ÷ Secondary turns.
Let's understand your transformer turns ratio result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Transformer Turns Ratio
- The turns ratio equals the voltage ratio for an ideal transformer — a 10:1 turns ratio steps voltage down by a factor of 10 (or up by 10 if reversed).
- Current ratio is the inverse of voltage/turns ratio for an ideal transformer — stepping voltage down by 10x correspondingly steps current up by 10x, assuming no losses.
Common Transformer Turns Ratio Mistakes to Avoid
- Assuming current ratio matches turns ratio directly, when current ratio is actually the inverse of the voltage/turns ratio for an ideal transformer.
When to Use This Calculator
This calculator finds transformer turns ratio by dividing primary winding turns by secondary winding turns — which directly determines the voltage transformation ratio.