RMS Peak Voltage Converter
Convert sine-wave voltage between RMS, peak and peak-to-peak values.
How to Use the RMS Peak Voltage Converter
Enter a sinusoidal voltage value and choose whether it is RMS, peak or peak-to-peak. The converter applies the standard sine-wave relationships between these voltage forms.
Practical Example
For a sine wave, 120 V RMS is about 169.7 V peak and about 339.4 V peak-to-peak.
Factors That Affect Voltage Relationships
The standard factors assume a pure sine wave. Distortion, waveform shape, clipping and measurement method can produce different RMS-to-peak relationships.
Frequently Asked Questions
What is peak voltage from RMS?
For a sine wave, peak voltage equals RMS voltage multiplied by the square root of 2.
What is peak-to-peak voltage?
It is the difference between the positive and negative waveform peaks.
Does this work for square waves?
The sine-wave factors do not apply directly to square or irregular waveforms.
Understanding RMS, Peak and Peak-to-Peak Voltage
RMS, peak and peak-to-peak values describe different aspects of an AC waveform. For a pure sine wave, peak voltage equals RMS voltage multiplied by the square root of two, while peak-to-peak voltage is twice the peak value.
These relationships assume a sinusoidal waveform. Square waves, pulses and distorted signals can have different RMS-to-peak relationships, so waveform shape must be known before applying the conversion. For equipment ratings, confirm whether the manufacturer specifies RMS, peak or peak-to-peak voltage.
Methodology and Practical Limits
For a sine wave, Vpeak = Vrms × √2 and Vpp = 2 × Vpeak. These relationships are waveform-dependent; square, triangle and non-sinusoidal signals have different RMS-to-peak relationships.