Otto Cycle Comression Ratio Calculator

Otto Cycle Comression Ratio Equation

$$ r = \frac{V_1}{V_2} $$ where:

r = Compression Ratio (Dimensionless)

V₁ = Cylinder volume at the beginning of the compression stroke at bottom dead center (kg/m³)

V₂ = Cylinder volume at the end of the compression stroke at top dead center (kg/m³)

Calculator

Property to Calculate:

Compression Ratio (r):

Cylinder volume at the beginning of the compression stroke (V₁):

Cylinder volume at the end of the compression stroke (V₂):

Equation Assumptions

The working fluid behaves as an ideal gas.
Specific heats remain constant.
Compression and expansion processes are adiabatic.
There is perfect mixing of the air and fuel.