Enter the total pressure and the specific gravity of the fluid into the calculator to convert the pressure to head. This calculator can also convert head to pressure.

Pressure to Head Calculator

Enter any 2 values to calculate the missing variable




Calculator Operations Required Inputs
Convert Head and Specific Gravity to Pressure Head, Specific Gravity
Convert Pressure and Specific Gravity to Head Pressure, Specific Gravity
Convert Pressure and Head to Specific Gravity Pressure, Head

Pressure to Head Formula

The following formula is used to convert a pressure to head. 

h = p / .433*SG
  • Where h is the head (ft)
  • p is the pressure (psi)
  • SG is the specific gravity of the fluid.

To calculate head from pressure, divide the pressure by .433 then multiply by the specific gravity.

PSI to Feet of Head Conversion Table (Water, SG = 1.00; 1 ft ≈ 0.433 psi)
Pressure (PSI) Head (ft H₂O)
1/160.144
⅛0.289
1/60.385
¼0.577
⅓0.770
⅜0.866
½1.155
⅝1.443
⅔1.540
¾1.732
⅞2.021
12.309
1¼2.887
1⅓3.079
1½3.464
1¾4.042
24.619
2½5.774
36.928
49.238
* Rounded to 3 decimals. Assumes water (SG = 1.00). Using calculator factor: 1 ft ≈ 0.433 psi, so 1 psi ≈ 2.309 ft of head.

Pressure to Head Definition

Converting pressure into a head is done through the division of the pressure of the specific gravity of the fluid.

Pressure to Head Example

How to convert pressure to head?

  1. First, determine the pressure.

    Measure the total pressure in PSI.

  2. Next, determine the specific gravity.

    Calculate or measure the specific gravity of the fluid.

  3. Finally, calculate the head.

    Calculate the head in feet using the equation above.

FAQ

What is a head?

A head is defined as the total height of a liquid column that exerts a certain pressure on the base of the liquid container by the fluid.