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Peak voltage calculator

For a zero-offset sine wave, peak voltage = RMS voltage × √2.

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Answer

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For a zero-offset sine wave, peak voltage = RMS voltage × √2.

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Precision and calculation record
Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.
Step-by-step calculation
Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.
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    Formula and assumptions
    Peak-to-peak voltage is twice the peak. These relationships do not apply unchanged to square waves or distorted waveforms.
    Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.
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    Updated 
    Using Peak voltage calculator
    For a zero-offset sine wave, peak voltage = RMS voltage × √2.
    Peak-to-peak voltage is twice the peak. These relationships do not apply unchanged to square waves or distorted waveforms.
    Next: Basic calculator
    A worked example
    With sine-wave rms voltage (v) = 100, the peak voltage (v) is 141.4213562373095.
    Before you use the result
    Peak-to-peak voltage is twice the peak. These relationships do not apply unchanged to square waves or distorted waveforms.
    Example results for sine-wave rms voltage (v)
    These examples use the formula above. They are reference calculations, not recommended settings.
    Sine-wave RMS voltage (V)Peak voltage (V)
    5070.7106781187
    100141.421356237
    200282.842712475
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    ToolOctopus. “Peak voltage calculator.” Updated 2026-09-26. https://tooloctopus.com/peak-voltage-calculator.
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