How to use this calculator
- Enter nominal gdp, gdp deflator (base 100).
- 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
Real GDP = nominal GDP × 100 / deflator.
Assumptions and limitations
The index must be based on 100; this is a conversion of supplied data, not national statistics.
Worked example
With nominal gdp = 1250, gdp deflator (base 100) = 125, real gdp is approximately 1000.
What the result means
Real GDP expresses output using the prices underlying your selected base year.
Common questions
How should I interpret real gdp?
Real GDP expresses output using the prices underlying your selected base year.
What should I check before using this result?
The index must be based on 100; this is a conversion of supplied data, not national statistics.
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.