Please enter all required values.
Formulas & Mathematical Logic
Step 1: Convert input value to volts using selected input unit: V = value, mV = value × 0.001, kV = value × 1000.
If input is Peak Voltage: Vp = input voltage.
If input is RMS Voltage: Vp = Vrms × sqrt(2).
If input is Average Voltage: Vp-p = Vavg × PI, therefore Vp = Vavg × PI / 2.
Peak-to-Peak Voltage: Vp-p = 2 × Vp.
Step-by-Step Example
Example 1: input type = RMS voltage, input voltage = 230 V.
Step 1: Input is already in volts, so inputVolts = 230 V.
Step 2: Peak voltage = 230 × sqrt(2) = 325.27 V.
Step 3: Peak-to-peak voltage VP-P = 2.8284 × 230 = 650.53 V.
Example 2: input type = Peak voltage, input voltage = 10 V.
Peak-to-peak voltage VP-P = 2 × 10 = 20 V.
About This Calculator
Calculate peak-to-peak voltage VP-P from peak, RMS or average voltage.
The CalcBoy Peak-to-Peak Voltage Calculator converts peak, RMS or average voltage into peak voltage and peak-to-peak voltage VP-P using V, mV and kV units.
Peak-to-peak voltage, written as VP-P, Vpp or Vp-p, is the total voltage swing between the highest positive peak and the lowest negative peak of a waveform. It is a very common value on oscilloscopes, signal generators, audio amplifiers, inverter testing and AC waveform measurements. While RMS voltage tells effective heating value, VP-P shows the complete instantaneous voltage swing.
This calculator is useful when you know a peak voltage, RMS voltage or average voltage and need the corresponding peak-to-peak voltage. For a sine wave, RMS voltage is multiplied by 2.8284 to estimate VP-P. If peak voltage is already known, VP-P is simply double the peak voltage. If average voltage is used, the preserved source logic calculates Vp-p from PI relationship.
Use this tool for oscilloscope scaling, waveform conversion, AC signal analysis, transformer secondary checking, inverter output testing, signal generator setup, rectifier reference work and high-voltage waveform calculation. For distorted or non-sine waveforms, always confirm the actual waveform shape because RMS-to-VP-P relationships change with waveform type.
Best UsePeak-to-peak voltage VP-P conversion.
Supported InputsPeak voltage, RMS voltage, average voltage, V, mV and kV.
Helpful ForOscilloscopes, signal generators, AC waveforms, inverters and amplifiers.
Design ReminderVP-P can reveal full voltage stress across components.
Tip: A 230 V RMS sine wave is about 650 V peak-to-peak. That full swing matters when checking insulation, capacitor voltage rating and oscilloscope probe limits.
Frequently Asked Questions
What is peak-to-peak voltage VP-P?
Peak-to-peak voltage is the full voltage swing from the positive peak of a waveform to the negative peak.
How do I calculate VP-P from peak voltage?
For a symmetrical waveform, peak-to-peak voltage equals 2 × peak voltage.
How do I calculate VP-P from RMS voltage?
For a sine wave, peak-to-peak voltage equals RMS voltage × 2.8284.
Is Vpp the same as VP-P?
Yes. Vpp, Vp-p and VP-P are common ways to write peak-to-peak voltage.
Why is VP-P useful on an oscilloscope?
Oscilloscopes often show waveform swing directly, so VP-P helps compare the full vertical voltage span.
Can this calculator use kV input?
Yes. Select kV and the calculator converts the input internally to volts.