Buying power of $100 in 1984

This chart shows a calculation of buying power equivalence for $100 in 1984 (price index tracking began in 1915).

For example, if you started with $100, you would need to end with $361.16 in order to "adjust" for inflation (sometimes refered to as "beating inflation").

When $100 is equivalent to $361.16 over time, that means that the "real value" of a single New Zealand dollar decreases over time. In other words, a dollar will pay for fewer items at the store.

This effect explains how inflation erodes the value of a dollar over time. By calculating the value in 1984 dollars, the chart below shows how $100 is worth less over 38 years.

According to the OECD and the World Bank, each of these NZD amounts below is equal in terms of what it could buy at the time:

This conversion table shows various other 1984 amounts in today's dollars, based on the 261.16% change in prices:

How to calculate inflation rate for $100 since 1984

Our calculations use the following inflation rate formula to calculate the change in value between 1984 and today:

Then plug in historical CPI values. The New Zealand CPI was 33.20356 in the year 1984 and 119.9165 in 2022:

$100 in 1984 has the same "purchasing power" or "buying power" as $361.16 in 2022.

To get the total inflation rate for the 38 years between 1984 and 2022, we use the following formula:

Plugging in the values to this equation, we get:

Data source & citation

» Read more about inflation and investment.