North Carolina Public Library Data

Library inflation calculator

Use this calculator for public, academic, or special library data. Using inflation-adjusted data in your advocacy will have a stronger impact than showing the change in dollar value alone. Adjusting for inflation takes into account the rising cost of library management over time. Using per capita data additionally expresses what this revenue means in per person spending ability from year to year. This calculator takes data about past and current library money (revenue, state aid, etc.) and adjusts for inflation by converting the historic data to the most current year's data. It also calculates the percentage difference between the inflation-adjusted values and calculates per capita revenue. See the bottom of the page to learn how this is calculated.

Year of historic data:
Input historic data ($): No commas
Input current data ($): No commas
Optional (for per capita analysis)
Input historic population: No commas
Input current population: No commas

HOW THIS IS CALCULATED: The calculator uses the U.S. Bureau of Economic Analysis' Table 3.15.4 "Price Indexes for Government Consumption Expenditures and Gross Investment by Function", State and Local, Libraries and Other data, to adjust for inflation. To date, 2012 is the most current inflation index that has been released. If the inflation numbers you're seeing look slightly different from those you calculated using this website last year, the reason is that on July 31 2013 the BEA released the 14th comprehensive revision of this inflation data. Read more about the comprehensive revision here.