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Secondary voltage
Normal Confidence 95/100 24 V
Vs/Vp = Ns/Np
This normal result should be checked against measurements, material tolerances, safety factors, and local project requirements.
Selected currency USD ($)
Unit system imperial
Calculator version uces-2.1
Formula version formula-1.0
Last reviewed 2026-05-18 Breakdown Ideal secondary current
20 A
X Input and Formula Breakdown This calculator applies the formula Vs/Vp = Ns/Np. Enter each value with the matching unit, and AZCalculate updates the result instantly.
Ideal secondary current
20 A
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Trust note
Planning estimate Use this result as a practical estimate. Real-world conditions, local rules, measurement tolerance, and changing inputs can affect the final outcome.
Medium risk context Difficulty: professional Confidence estimate: 95/100 Reviewed by: Engineering content reviewer Calculator vuces-2.1 / Formula vformula-1.0 3 sources listed Vs/Vp = Ns/Np
This calculator applies the formula Vs/Vp = Ns/Np. Enter each value with the matching unit, and AZCalculate updates the result instantly.
Variable descriptions
primaryVoltage(V) Primary voltage: Primary voltage measured in V, entered as a known value.
primaryTurns Primary turns: Primary turns, entered as a known value.
secondaryTurns Secondary turns: Secondary turns, entered as a known value.
primaryCurrent(A) Primary current: Primary current measured in A, entered as a known value.Use consistent units for values that are multiplied, divided, or compared. Results may be rounded for readability, while the calculator keeps greater precision internally. Real-world measurements and assumptions can introduce small differences from the calculated estimate. Common uses • Estimate transformer output • Compare turns ratios • Plan electrical systems Assumptions
What this calculation assumes Calculations assume compatible engineering units and idealized conditions. Safety factors, tolerances, material variation, and standards should be reviewed separately. Inputs are assumed to describe the same scenario and use compatible units. Results may be rounded for readability. Avoid mistakes
Quick checks before you rely on the result Ignoring safety factors. Using rated values instead of actual operating conditions. Mixing units, periods, currencies, or measurement systems without converting first. Rounding intermediate values too early. Step-by-Step Explanation Follow the reasoning, not only the final number.
1 Set up the calculation Enter the known values in the calculator fields.
2 Work through step 2 Keep the units consistent with the labels shown beside each input.
3 Work through step 3 Apply the formula: Vs/Vp = Ns/Np.
4 Interpret the result Review the primary result and supporting values.
Worked example
Practical transformer calculator example Known values Primary voltage: 240 V Primary turns: 1,000 Secondary turns: 100 Primary current: 2 A Calculation 1. Start with the known values shown for this transformer calculator scenario. 2. Substitute those values into Vs/Vp = Ns/Np. 3. Evaluate the expression and keep the requested unit and rounding. Result and meaning Secondary voltage: 24 V; Ideal secondary current: 20 A; Turns ratio: 10 :1
Calculator guide
About this Transformer Calculator Calculate transformer secondary voltage, current, and turns ratio. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
References
Sources used for this calculator Found something that does not look right? We work hard to keep every calculator accurate and useful. If you notice a calculation error, missing option, or unclear explanation, please let us know so we can review and correct it promptly.
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FAQ
Transformer Calculator FAQs How does the transformer calculator work?+ It uses Vs/Vp = Ns/Np and calculates the result from the values you enter.
Can I copy or print the result?+ Yes. AZCalculate calculator pages include copy, share, and print actions.
Should I include a safety factor?+ Yes for real engineering decisions. Use applicable standards and professional review.
Which unit system should I use?+ Use a consistent unit system and convert all inputs before combining them.
How should I use this calculator result?+ Use it as an estimate and compare it with the formula, assumptions, and examples shown on the page.
Why can real-world results differ?+ Real-world inputs can include local rules, changing rates, measurement tolerances, and conditions outside the core formula.
What information do I need for the transformer calculator?+ Enter the known values requested by the calculator. Use the unit selectors where available and make sure the values describe the same scenario.
How accurate is the transformer calculator?+ The calculator follows the formula shown on this page. Accuracy depends on the values, units, assumptions, and rounding used in your scenario.
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