If you earn $20 per hour and work a standard 40-hour week, your annual income can be calculated by first determining your weekly earnings. By multiplying your hourly wage of $20 by the number of hours you work in a week, which is 40, you arrive at a weekly income of $800. To find your annual income, you then multiply this weekly amount by the total number of weeks in a year, which is typically 52. Therefore, $800 multiplied by 52 weeks results in an annual income of $41,600. It is important to note that this figure does not account for taxes or any deductions that may apply, so your take-home pay could be lower depending on your specific tax situation.