text: You have to divide the salary by the number of hours worked to earn it. That's the only way!\n\nIf you get paid $4000 a month and you work 40 hours a week you have worked an AVERAGE of 173.33 hours per month (40 hours/week times 52 weeks per year divided by 12 months), depending on your exact pay period. Thus you would be making  a little more than $23 an hour.\n\nThe 2080 quoted by Zandelia is just 40 hours per week times 52 weeks in a year or the number of hours worked in a standard year. However, as other people pointed out, you might work more than 40 hours weekly on salary... or LESS. What ever the number of hours worked in a pay period, divide the pay for that  period by the hours to get the answer!