GDP Deflator Calculator
Enter nominal and real GDP to calculate the GDP deflator, or use the deflator to find real or nominal GDP. Supports multi-year analysis and period-over-period inflation.
Use the GDP Deflator Calculator
Calculate GDP Deflator
Formula: Deflator = (Nominal GDP / Real GDP) × 100
Result
GDP Deflator Index (Base Year = 100)
Price Level vs Base Year
Formula substitution
Summary
The GDP Deflator Calculator measures the price level of all goods and services in an economy relative to a base year. Unlike the CPI, which tracks a fixed basket of consumer goods, the GDP deflator covers the entire economy. Use it to convert nominal GDP to real GDP, find an implied price level, or measure inflation across time periods.
How it works
- Choose a calculation mode: find the deflator, real GDP, or nominal GDP.
- Enter the two known values for your chosen mode.
- Results appear instantly — deflator, inflation rate, and interpretation.
- Switch to the Inflation Rate tab to compare deflators between two periods.
- Use the Multi-Year Analysis tab to enter up to 5 years of data and view deflators and year-over-year inflation in a table.
Use cases
- Converting nominal GDP figures to inflation-adjusted real GDP.
- Measuring economy-wide price inflation between two years.
- Comparing price levels across countries or time periods.
- Macroeconomics coursework and homework problems.
- Analyzing historical GDP data from government statistical agencies.
- Verifying textbook sample calculations for GDP accounting.
Frequently Asked Questions
Last updated: 2026-05-28 · Reviewed by Nham Vu