Calculate absolute pressure ratio from inlet and discharge pressures.
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Use the Compression Ratio Calculator to calculate absolute pressure ratio from inlet and discharge pressures. The calculator uses Inlet absolute pressure and Outlet absolute pressure and reports compression ratio.
Read the result in the context of the selected units and pressure basis. For this tool, the primary outputs are compression ratio. Change one input at a time when comparing scenarios so the effect of each variable remains clear.
PneumaForge applies this verified method: r=P2_abs/P1_abs. The functional engine is shared with related tools in the gas-state family, while this page solves the specific intent represented by compressor compression ratio calculator.
r=P2_abs/P1_absReproducible example: start with the calculator's default values (Inlet absolute pressure = 1.01325; Outlet absolute pressure = 8.01325) and calculate the result. Then change the variable most relevant to your application and compare the new compression ratio against the baseline.
Dry-air ideal gas unless humidity option is enabled. Gauge pressure must be converted to absolute first.
It is designed to calculate absolute pressure ratio from inlet and discharge pressures. The reported outputs are compression ratio.
The calculator uses Inlet absolute pressure and Outlet absolute pressure. Only use values that represent the same operating condition or design case.
The calculation follows: r=P2_abs/P1_abs. The page also states the assumptions that define where the method is valid.
Dry-air ideal gas unless humidity option is enabled. Gauge pressure must be converted to absolute first.
Yes. PneumaForge converts supported units through canonical engineering units. For compressed-air reference flows and pressure bases, the reference pressure and temperature must also remain consistent.