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Pressure Ratio Formula

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Pressure Ratio is ratio of final to initial pressure. Check FAQs

P R = \frac{P f}{P i}

P_R - Pressure Ratio?P_f - Final Pressure?P_i - Initial Pressure?

Pressure Ratio Example

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With units

Only example

Here is how the Pressure Ratio equation looks like with Values.

Here is how the Pressure Ratio equation looks like with Units.

Here is how the Pressure Ratio equation looks like.

3.9846 = \frac{259}{65}

3.9846 = \frac{259Pa}{65Pa}

3.9846 = \frac{259}{65}

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Pressure Ratio Solution

Follow our step by step solution on how to calculate Pressure Ratio?

FIRST Step Consider the formula

P R = \frac{P f}{P i}

Next Step Substitute values of Variables

∴

P R = \frac{259Pa}{65Pa}

Next Step Prepare to Evaluate

∴

P R = \frac{259}{65}

Next Step Evaluate

∴

P R = 3.98461538461538

LAST Step Rounding Answer

∴

P R = 3.9846

Pressure Ratio Formula Elements

Variables

Pressure Ratio

Pressure Ratio is ratio of final to initial pressure.

Symbol: P_R

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Pressure Ratio

Final Pressure

Final Pressure is the pressure of a fluid or gas at the conclusion of a process or within a system.

Symbol: P_f

Measurement: PressureUnit: Pa

Note: Value should be greater than 0.

Formulas to find Final Pressure

Initial Pressure

Initial Pressure refers to the pressure of a fluid or gas at the beginning of a process or within a system.

Symbol: P_i

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Initial Pressure

Other formulas in Thermodynamics and Governing Equations category

Go Heat Capacity Ratio

γ = \frac{C p}{C v}

Go Internal Energy of Perfect Gas at given Temperature

U = C v \cdot T

Go Enthalpy of Ideal Gas at given Temperature

h = C p \cdot T

Go Stagnation Velocity of Sound

a o = \sqrt{γ \cdot [R] \cdot T 0}

How to Evaluate Pressure Ratio?

Pressure Ratio evaluator uses Pressure Ratio = Final Pressure/Initial Pressure to evaluate the Pressure Ratio, The Pressure ratio formula is defined as the ratio of the final pressure after process to the initial pressure before process. Pressure Ratio is denoted by P_R symbol.

How to evaluate Pressure Ratio using this online evaluator? To use this online evaluator for Pressure Ratio, enter Final Pressure (P_f) & Initial Pressure (P_i) and hit the calculate button.

FAQs on Pressure Ratio

What is the formula to find Pressure Ratio?

The formula of Pressure Ratio is expressed as Pressure Ratio = Final Pressure/Initial Pressure. Here is an example- 3.984615 = 259/65.

How to calculate Pressure Ratio?

With Final Pressure (P_f) & Initial Pressure (P_i) we can find Pressure Ratio using the formula - Pressure Ratio = Final Pressure/Initial Pressure.

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