Nominal vs Real GDP
Same economy, two lenses — current rupee values vs inflation-adjusted volume of output.
Start here
Nominal GDP is the value of output counted at current market prices; Real GDP is the inflation-adjusted volume of output measured at constant base-year prices via the GDP deflator.
If everyone charges 10% more this year but produces the same number of cars and wheat bags, nominal GDP rises — real GDP does not. That distinction is what separates “prices went up” from “we actually produced more.”
Side-by-side comparison
| Feature | Nominal | Real GDP |
|---|---|---|
| Formula link | Numerator of GDP deflator | Denominator relationship |
| Policy | Headline size | Growth targets, productivity |
| Price basis | Current year market prices | Fixed base-year prices (2011-12 series in India) |
| Inflation sensitivity | Rises with price increases even if output is flat | Isolates quantity growth from inflation |
| Growth rate used | Can overstate “growth” during inflation | Preferred for year-on-year growth comparison |
| Published by | NSO, MoSPI (quarterly and annual) | NSO, MoSPI — derived using GDP deflator |
At a glance
Prices used
Current year prices
Fixed base year prices
Inflation
Not removed
Removed via deflator
Use
Current size of economy
True growth comparison over years
10 lakh widgets at ₹100 → ₹110
Last year: 10 lakh units × ₹100 = ₹100 crore nominal GDP. This year: same 10 lakh units but price ₹110 → ₹110 crore nominal GDP. Real GDP (base year ₹100) still counts ₹100 crore of “real” output — growth is 0% in volume, 10% in money illusion.
What this means for the exam
Nominal can rise from inflation alone. Real GDP isolates quantity growth using GDP deflator.
Prelims statement check
“If real GDP exceeds nominal GDP in a growing developing economy, it usually indicates high inflation.”
Incorrect — Deflator logic
Normally nominal ≥ real when prices rise; real > nominal suggests deflation — rare in India.
“Real GDP is calculated by dividing nominal GDP by the GDP deflator and multiplying by 100.”
Correct — Deflator formula
Real GDP = (Nominal GDP / GDP Deflator) × 100 — standard national accounts identity.
PYQ Linkage
Economic growth in India is usually accompanied by:
Key Takeaway
Real GDP = Nominal GDP / GDP Deflator — measures actual output growth