# Fluid Formulas

We’ve listed the most common hydraulic fluid formulas, such as velocity through piping, compressibility of oil or fluid, specific gravity, flow factor, and viscosity. Looking for more information about hydraulic pumps? Need a hydraulic repair service? Contact us today!

## Hydraulic Fluid Formulas

Hydraulic Fluid Formulas For: Word Formula Letter Formula
Velocity Through Piping
In Feet/Second Velocity
Velocity = V =
Compressibility of Oil
In Additional Required Oil To Reach Pressure
Volume
VA =
* Approximately 1/2 % per 100 psi
Compressibility of a Fluid Compressibility = C(ß)=
Specific Gravity of a Fluid Specific =
Gravity
SG =
Valve (Cv) Flow Factor Valve Factor (Cv) =
Cv =
Viscosity in Centistokes For Viscosities of 32 to 100 Saybolt Universal Seconds:
Centistokes = .2253 x SUS –
CS = .2253 SUS –
Viscosity in Centistokes For Viscosities of 100 to 240 Saybolt Universal Seconds:
Centistokes = .2193 x SUS –
CS = .2193 SUS –
Viscosity in Centistokes For Viscosities Greater Than 240 Saybolt Universal Seconds:
Centistokes =
CS =

HYDRAULIC FLUID FORMULAS NOTE: Saybolt Universal Seconds is often abbreviated SSU.