Enter the pressure range (psi), the voltage reading (volts), the upper voltage limit (volts), and the voltage lower limit (volts) into the calculator to determine the Pressure From Voltage. 

Pressure From Voltage Formula

The following formula is used to calculate the Pressure From Voltage.

P = PR * (Vr – VL) / (Vu – VL)

  • Where P is the Pressure From Voltage (psi)
  • PR is the pressure range (psi) 
  • Vr is the voltage reading (volts) 
  • VL is the voltage lower limit (volts) 
  • Vu is the voltage upper limit (volts)

How to Calculate Pressure From Voltage?

The following example problems outline how to calculate the Pressure From Voltage.

Example Problem #1

  1. First, determine the pressure range (psi). In this example, the pressure range (psi) is given as 100 .
  2. Next, determine the voltage reading (volts). For this problem, the voltage reading (volts) is given as  32 .
  3. Next, determine the voltage lower limit (volts). In this case, the voltage lower limit (volts) is found to be 15.
  4. Next, determine the upper voltage limit. For this problem, this is 30.
  5. Finally, calculate the Pressure From Voltage using the formula above: 

P = PR * (Vr – VL) / (Vu – VL)

Inserting the values from above and solving yields: 

P = 100 * (32 – 15) / (30 – 15) = 113.33 (psi)


Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

pressure range (psi) = 500

voltage reading (volts) = 60

voltage lower limit (volts) = 40

voltage upper limit (volts) = 50

Enter these given values yields: 

P = 500* (60 – 40) / (50 – 40) = 1000 (psi)