Most companies are required by law to calculate overtime at

$2\mathrm{.}5$ times the worker's regular hourly wage for hours over $37\mathrm{.}5$ per week.

the worker's regular hourly wage.

$1\mathrm{.}5$ times the worker's regular hourly wage for hours over $44$ per week.

$1\mathrm{.}25$ times the worker's regular hourly wage for hours over $42$ per week.