Compression Ratio Calculator

Enter the cylinder bore diameter, stroke length, and the minimum clearance at end of the compression stroke. The calculator will evaluate and display the compression ration of the engine.

Compression Ratio Formula

The following formula can be used to calculate the compression ratio of an engine.

CR = [ (PI/4*b^2*s) + Vc ]/Vc

  • Where CR is the compression ratio
  • b is the cylinder bore diameter
  • s is the stroke length
  • Vs is the minimum clearance at the end of the compression stroke
What is the compression ratio? - Quora

How to calculate compression ratio

  1. First, measure the bore cylinder diameter

    This should be the inner diameter of the cylinder, not the outer diameter.

  2. Next, measure the stroke length

    Measure the stroke length of the cylinder.

  3. Next, determine the minimum clearance

    It’s important that the minimum clearance is the clearance when the compression stroke is at it’s highest point.

  4. Calculate the compression ratio

    Enter the information from steps 1-3 into the equation above to calculate the compression ratio.

FAQ

What is a compression ratio?

A compression ratio is a fundamental specification in combustion engine design that measure the ratio of the total working volume of a piston and it’s compression volume.

What is a good compression ratio?

The higher the compression ratio the better the performance of a piston. The more compression the fuel undergoes, the more pressure it sees, and the higher the thermal efficiency of the engine.

What is thermal efficiency of an engine?

Thermal efficiency is the total mechanical energy that can be extracted from a set amount of fuel.

compression ratio calculator

Related Terms

compression ratio calculator
compression ratio formula
how to calculate compression ratio
what is compression ratio
engine compression calculator
dynamic compression calculator
summit compression calculator
dynamic compression ratio calculator
simple compression ratio calculator
engine compression ratio calculator
how to find compression ratio
compression ratio to psi calculator
what does compression ratio mean
how to figure compression ratio
compression ratio octane calculator
how to determine compression ratio
how to measure compression ratio
how to calculate compression ratio from psi
13 to 1 compression what octane
what is compression ratio in engine
compression ratio equation
sbc compression calculator
how to figure out compression ratio
compression ratio chart
static compression calculator
cylinder pressure to compression ratio calculator
pressure ratio formula
12 to 1 compression what octane
static compression ratio calculator
how to determine compression ratio without disassembling engine
summit compression ratio calculator
pressure ratio calculator
compression ratio calc
what is a good compression ratio
effective compression ratio calculator
compression ratio of diesel engine formula
what is a high compression ratio
compression ratio to horsepower calculator
what is the compression ratio of diesel engine
diamond compression calculator
cranking compression calculator
sbc compression ratio chart
compression ratio calculator summit
sbc compression ratio calculator
rsr compression ratio calculator
head gasket thickness calculator
k series compression calculator
how do you calculate compression ratio
how to calculate engine compression
how to get compression ratio
data compression ratio calculator
turbo compression ratio calculator
what compression ratio for 93 octane
what is compression ratio in a car
how to calculate engine compression ratio
how to calculate dynamic compression ratio
what is a compression ratio in an engine
wallace compression ratio calculator
zeal compression calculator
engine compression ratio formula
2 stroke compression ratio calculator
what is a variable compression engine
piston dome volume calculator
compression ratio formula for ic engine
how to calculate compressor pressure ratio
figuring compression ratio
what compression ratio for pump gas
cylinder head volume calculator
what is the highest compression ratio for 93 octane
rsr compression calculator
how to find out compression ratio
finding compression ratio
psi to compression ratio calculator
what is the formula for compression ratio
determine compression ratio
what is the best compression ratio
cylinder compression calculator
diamond compression ratio calculator
file compression calculator
calculate dynamic compression ratio
file compression ratio calculator
compression ratio calculation formula
what is the average compression ratio of a diesel engine
what is considered a high compression engine
compressor pressure ratio formula
data compression calculator
what does engine compression ratio mean
combustion chamber volume calculator
compression ratio calculator mm
how to compute compression ratio
combustion chamber volume formula
how to calculate compression ratio with compression test
how to measure engine compression ratio
engine pressure ratio formula
how to determine engine compression ratio
image compression ratio formula
how to calculate compression ratio in image processing
piston compression calculator
head gasket cc calculator
what compression ratio needs premium gas
what octane for 10 1 compression
what does 10 to 1 compression mean
head gasket volume calculator
formula compression ratio
compression ratio of compressor formula
figuring out compression ratio
how to calculate compression ratio of engine
compression ratio converter
compressor compression ratio calculator
gzip compression ratio calculator
how to calculate combustion chamber volume
what compression ratio for 87 octane
figure compression ratio
what is meant by compression ratio
engine cr calculator
what compression ratio is too high for pump gas
comp ratio calc
how to work out compression ratio
piston dish cc calculator
how compression ratio is calculated
motor compression calculator
compression percentage calculator
data compression ratio formula
what does compression ratio mean in cars
what is combustion ratio
compression ratio calculator metric
compression psi to ratio calculator
blower compression ratio calculator
dynamic compression ratio calculator and camshaft selection utility
what is the compression ratio of petrol engine
what is the maximum compression ratio of spark ignition engine
keith black dynamic compression ratio calculator
what is compression ratio of engine
compression ratio power calculator
supercharger compression ratio calculator
what is compression ratio in ic engine
what is compression ratio in diesel engine
diesel engine compression ratio calculator
what is the formula of compression ratio
what is compression ratio in bike
how to work out engine compression ratio
what is compression ratio of petrol engine
compression ratio to bar calculator
what is swept volume and clearance volume