John earns $750 in a work week. A regular work week for John consists of 5 work days with 8 hours a day. How much does John earn each hour?

To find out how much John earns each hour, we need to divide his total earnings by the number of hours he works.

In a regular work week, John works 5 work days with 8 hours each day, so he works a total of 5*8 = <<5*8=40>>40 hours.

Therefore, John earns $750 / 40 hours = $<<750/40=18.75>>18.75 per hour. Answer: \boxed{18.75}.