Nominal GDP vs Real GDP
Nominal GDP (FRED series GDP) measures total US output in current dollars; Real GDP (FRED GDPC1) strips out inflation by deflating with a chain-weighted price index. Their ratio, multiplied by 100, is the GDP deflator (FRED GDPDEF), the broadest available inflation measure because it covers every domestically produced good and service rather than just the consumer basket.
Also known as: Nominal GDP (gross domestic product)
Why This Comparison Matters
Nominal GDP (FRED series GDP) measures total US output in current dollars; Real GDP (FRED GDPC1) strips out inflation by deflating with a chain-weighted price index. Their ratio, multiplied by 100, is the GDP deflator (FRED GDPDEF), the broadest available inflation measure because it covers every domestically produced good and service rather than just the consumer basket. In Q1 2026 nominal GDP ran at $31.86 trillion seasonally-adjusted annualized rate against real GDP growth of 2.0%, with the deflator at 131.776 (2017=100), translating to a 4.2% nominal-versus-real gap. The gap was below 1% only briefly in 2009 and 2020, and it exceeded 8.5% just once in the post-Volcker era: Q4 2022.
What each series measures and why the gap is the deflator
Nominal GDP, FRED series GDP, is the dollar value of all final goods and services produced in the US measured at current-period prices, published by the BEA in the Quarterly NIPA release. Real GDP, FRED series GDPC1, is the same output volume measured at constant prices (currently 2017 reference dollars), constructed using a Fisher-ideal chain index that updates weights each quarter to reflect changing consumption patterns. The two are not parallel time series. Real GDP is the policy-relevant volume measure, while nominal GDP captures both volume and the price level.
The ratio of nominal to real GDP, scaled by 100, is the implicit price deflator (FRED GDPDEF), the broadest US inflation measure. Where CPI covers the urban consumer basket and PCE covers personal consumption expenditures, the GDP deflator covers everything: consumer goods, business investment, government services, and exports net of imports. As of Q1 2026 the deflator stood at 131.776 versus the 2017 base of 100, implying cumulative US-output inflation of 31.8% over nine years. The Q1 2026 quarter-over-quarter deflator change was 1.15 index points off Q4 2025's 130.624, which annualizes to 3.5%, consistent with the headline PCE print of 3.5% in March 2026.
How the gap behaved across the post-2020 cycle
Through 2020 Q2, the nominal-versus-real GDP gap collapsed temporarily as both series fell together under COVID lockdowns: real GDP contracted 28.0% annualized while nominal contracted 32.4%, leaving a deflator change near zero for that single quarter. From Q3 2020 through Q4 2022, the gap widened sharply as nominal GDP recovered faster than real activity, reflecting the most aggressive US inflation since 1981. Nominal GDP grew 13.8% in 2021 against real growth of 5.7%, an 8.1-percentage-point gap. The Q4 2022 print marked the peak: nominal grew 7.7% annualized against real at 2.6%, a 5.1-percentage-point quarterly gap, with the four-quarter accumulated gap above 8.5% for the first time since Q4 1980.
90-Day Statistics
No data available
No data available
Explore Each Metric
Related Scenarios & Forecasts
Get daily macro analysis comparing key metrics delivered to your inbox. Stay ahead of market-moving divergences.
Frequently Asked Questions
What is the GDP deflator and how does it relate to nominal vs real GDP?+
The GDP deflator (FRED series GDPDEF) is the ratio of nominal GDP to real GDP, multiplied by 100. As of Q1 2026 it stood at 131.776 versus the 2017 base of 100, implying 31.8% cumulative US-output inflation over nine years. The deflator is the broadest US inflation measure because it covers every domestically produced good and service, including business investment and government services, not just the consumer basket like CPI or PCE.
Why is the GDP deflator different from CPI?+
The deflator covers domestic production while CPI covers domestic consumption. CPI includes imported consumer goods that the deflator excludes, and the deflator includes business investment and government services that CPI excludes. The 2014-2015 dollar rally produced a sharp divergence with CPI hitting -0.2% year-over-year while the deflator held above 1.0%, because imported-goods deflation hit consumers but did not affect the production-side measure.
What was Q1 2026 GDP?+
Q1 2026 nominal GDP was $31,856 billion seasonally-adjusted annualized rate, with real GDP growth at 2.0% annualized and the deflator at 131.776 (2017=100), implying roughly 3.5% deflator inflation annualized. The Q4 2025 advance reading was 1.4% real growth (later revised to 0.5% in the third estimate) with nominal growth of 4.2%. The Q1 2026 reacceleration was supported by inventory build and government spending.
When did the nominal-vs-real GDP gap last exceed 8.5%?+
Related Comparisons
Explore Across Convex
Data sourced from FRED, CoinGecko, CBOE, and other providers. This page is for informational purposes only and does not constitute financial advice. Past performance does not guarantee future results.