Enter the phase to phase voltage (volts) into the calculator to determine the Phase to Ground Voltage. 

Phase to Ground Voltage Calculator

Phase-Ground Converter
Standard Systems
System Type

Enter any 1 value to calculate the other.

Phase to Ground Voltage Formula

The following formula is used to calculate the Phase to Ground Voltage. 

Vp-g = Vp-p / 1.73

Variables:

  • Where Vp-g is the Phase to Ground Voltage (volts)
  • Vp-p is the phase to phase voltage (volts) 

To calculate the phase-to-ground voltage, divide the phase-to-phase voltage by a value of 1.73.

Phase-to-Phase to Phase-to-Ground Voltage Conversion Table (V_LN = V_LL / 1.73)
Phase-to-Phase V_LL (V) Phase-to-Ground V_LN (V)
208120.231
380219.653
400231.214
415239.884
440254.335
460265.896
480277.457
575332.370
600346.821
690398.844
33001907.514
41602404.624
66003815.029
110006358.382
138007976.879
2200012716.763
3300019075.145
6600038150.289
11000063583.815
13200076300.578
* Rounded to 3 decimals. Uses V_LN = V_LL / 1.73 (approx √3). Inverse: V_LL ≈ 1.73 × V_LN.

How to Calculate Phase to Ground Voltage?

The following two example problems outline how to calculate the Phase to Ground Voltage.

Example Problem #1:

  1. First, determine the phase to phase voltage (volts). In this example, the phase to phase voltage (volts) is measured to be 45.
  2. Finally, calculate the Phase to Ground Voltage using the formula above: 

Vp-g = Vp-p / 1.73

Inserting the values from above and solving the equation with the imputed values gives: 

Vp-g = 45 / 1.73 = 26.011 (volts)

Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

phase to phase voltage (volts) = 81

Entering these values into the formula or calculator above gives us:: 

Vp-g = 81 / 1.73 = 46.820 (volts)