First we assume you work 40 hours per week. If we multiply this by 52 weeks, we get 2,080 working hours. Simply multiply this number by $20 and you get a $41,600 salary.
To figure out the answer to the question, “$20 an hour is how much a year” when working part time, you need to take the number of hours per week you work and multiply that by 52.
Assuming you work the same amount of overtime hours all year, you take this number and multiply it by 52. Finally, you take this number and add it to your annual salary of $41,600 to get your annual salary.
Let’s assume you don’t get paid for vacation time. You need to subtract these weeks from your calculation. Assume you get 2 weeks of no pay. Since every year has 52 weeks, simply subtract the no pay weeks from 52.