How to Calculate Inflation Rate Using Real and Nominal Gdp
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Inflation Rate Calculator (Using Nominal and Real GDP)
This calculator helps you understand how to calculate the inflation rate between two periods using nominal GDP and real GDP. Inflation is the rate at which the general level of prices for goods and services is rising, and subsequently, purchasing power is falling. Central banks attempt to limit inflation, and avoid deflation, with targeted percentage increases in prices, and aim for a low, steady rate of inflation.
function calculateInflationRate() {
var nominalGDP1 = parseFloat(document.getElementById("nominalGDP1").value);
var realGDP1 = parseFloat(document.getElementById("realGDP1").value);
var nominalGDP2 = parseFloat(document.getElementById("nominalGDP2").value);
var realGDP2 = parseFloat(document.getElementById("realGDP2").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(nominalGDP1) || isNaN(realGDP1) || isNaN(nominalGDP2) || isNaN(realGDP2)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (realGDP1 <= 0 || realGDP2 <= 0) {
resultDiv.innerHTML = "Real GDP values must be positive.";
return;
}
// Calculate the GDP deflator for each period
// GDP Deflator = (Nominal GDP / Real GDP) * 100
var gdpDeflator1 = (nominalGDP1 / realGDP1) * 100;
var gdpDeflator2 = (nominalGDP2 / realGDP2) * 100;
// Calculate the inflation rate using the GDP deflators
// Inflation Rate = ((GDP Deflator 2 – GDP Deflator 1) / GDP Deflator 1) * 100
var inflationRate = ((gdpDeflator2 – gdpDeflator1) / gdpDeflator1) * 100;
resultDiv.innerHTML = "
Results:
";
resultDiv.innerHTML += "GDP Deflator (Period 1): " + gdpDeflator1.toFixed(2) + "";
resultDiv.innerHTML += "GDP Deflator (Period 2): " + gdpDeflator2.toFixed(2) + "";
resultDiv.innerHTML += "Inflation Rate (Period 1 to Period 2): " + inflationRate.toFixed(2) + "%";
var explanation = "Understanding the Calculation:";
explanation += "The GDP deflator is a measure of the price level of all new, domestically produced, final goods and services in an economy in a given year. The GDP deflator is often used as a measure of inflation. By comparing the GDP deflator of two different periods, we can calculate the inflation rate between them.";
explanation += "The formula used is:";
explanation += "Inflation Rate = [ (GDP Deflator of Period 2 – GDP Deflator of Period 1) / GDP Deflator of Period 1 ] * 100";
explanation += "A positive inflation rate indicates that prices have generally increased between the two periods, while a negative rate (deflation) indicates a general decrease in prices.";
resultDiv.innerHTML += explanation;
}
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