Working 52 weeks at 40 hours of work per week results in 2,080 work hours per year, so an annual salary can be converted to an hourly wage through the formula (hourly wage) equals (annual salary) divided by (2,080 hours worked per year).
The above formula assumes that you make paid vacation, so that you get paid for 52 weeks of work. If you make wages and get no paid vacation, you must subtract the hours of vacation you take from the number 2,080 in the formula. For instance, two weeks of vacation would mean that the salaried job effectively pays for 80 more hours per year than the waged job, so the formula is (hourly wage) equals (annual salary) divided by (2,000 hours worked per year). To include holiday pay, subtract an additional eight hours for each day of holiday pay.
Finally, as an example, if you make an annual salary of $50,000 and take two weeks of vacation in a year, with unpaid vacation and no holidays your equivalent wage would be $25 an hour. With paid vacation and no holidays, your equivalent wage would be $24.04 an hour, and with unpaid vacation and eight paid holidays, your equivalent wage would be $24.70 an hour. In other words, to make $50,000 with an hourly wage, you must get paid $25 an hour and work for 50 weeks, or get paid $24.04 and hour and work for all 52 weeks of the year.