If I am salaried, how do I calculate my hourly rate?

Divide your annual salary by your standard hours, and then divide by the number of weeks worked per year.  For example:

$40,000 / 40 hours per week / 52 weeks per year = $19.23

$36,300 / 30 hours per week / 52 weeks per year = $23.27

$45,000 / 40 hours per week / 40 weeks per year = $28.13