A real wage index for a specific year is calculated by dividing the nominal wage index by the Consumer Price Index (CPI) for that year and then multiplying the result by 100. This index provides a standardized way to track the change in real wages over time compared to a base year. The formula is:

$\text{Real Wage Index} = \left(\frac{\text{Nominal Wage Index}}{\text{Consumer Price Index}}\right) \times 100$