Bridge Rectifier Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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Small changes can matter a lot in bridge rectifier. Electronics calculations often mix small component values with high switching frequencies, so prefixes such as µ, m, k, and M deserve careful attention. Use the calculator as a transparent first model, then decide whether your real system needs a more detailed treatment.

What this calculator does

Use this page to evaluate rectifier voltage from DC voltage (VDC), Peak Voltage (VPeak). The result is most useful when the entered quantities describe one consistent physical setup and the displayed units stay attached to the number.

How to use it

Use measured, specified, or deliberately hypothetical values for DC voltage (VDC), Peak Voltage (VPeak). Set Calculate to match the solve path you want. Keep the quantity definitions and unit prefixes exactly as labeled; a correct number in the wrong physical quantity or prefix will still produce a misleading result.

How the calculation works

For an ideal full-wave rectified sine with no smoothing, average DC voltage and peak voltage are related by VDC = 2Vpeak/π, so Vpeak = πVDC/2. The selector determines which value is being solved.

Example

To use the filled 12 V DC value, switch Calculate to Peak Voltage. The ideal sine relation gives Vpeak = π×12/2 ≈ 18.85 V. If you instead want DC voltage, enter peak voltage and let the page use VDC = 2Vpeak/π.

How to interpret the result

Treat the rectifier voltage as an ideal circuit-design quantity for the entered topology and values. It is most useful for first-pass component sizing or comparison, followed by checks against ratings, tolerances, ripple, losses, and thermal behavior.

Limitations and notes

The selector names the quantity to calculate, so Calculate DC voltage requires a peak-voltage input, while Calculate Peak Voltage requires a DC input. The default screen has 12 V in the DC field while DC is selected, which can produce Check inputs until the solve direction is changed. Diode drops, ripple, load, and smoothing capacitors are not modeled.