$$ aagh=(10 – zz+\gamma^{Db})/\Omega $$

Where:

$$ aagh $$ = the relative level of chaos in your house

$$ \gamma $$ = the number of children making noise

$$ ^{Db}$$ = the decibel level of the children

$$ zz $$ = The number of hours of sleep you really got the night before

$$ \Omega $$ = The number of 20 minute increments you have spent in prayer the day before (Mass counts as three).