How to use this calculator
- Enter nominal gdp, real gdp.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
GDP deflator = nominal GDP / real GDP × 100.
Assumptions and limitations
Use the same country, period, units and national-account series.
Worked example
With nominal gdp = 1250, real gdp = 1000, gdp deflator (base 100) is approximately 125.
What the result means
The deflator measures the price component of domestic output, not a household CPI basket.
Common questions
How should I interpret gdp deflator (base 100)?
The deflator measures the price component of domestic output, not a household CPI basket.
What should I check before using this result?
Use the same country, period, units and national-account series.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.