This
calculator is intended for use as a general
estimate of your compression only. Certain
variables that cannot be accounted for may cause
the actual compression ratio to vary - such as a
head that has been milled. Please use your own discretion.
Default values have been
provided for your convenience. You can enter your
own custom values in the edit boxes below to match
your personal setup as needed.
Height (in) 1mm = 0.03937 in [negative value = out of the hole]
Note:
You must adjust your piston-to-deck height if you
use a piston other than stock. Use the chart to
find the compression heights. Then the formula
under the chart to figure your piston-to-deck
height.