How to use this calculator
- Enter actual real gdp, estimated potential 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
Output gap=(actual−potential)/potential×100%.
Assumptions and limitations
Potential GDP is an uncertain model estimate; this tool does not estimate it from national data.
Worked example
With actual real gdp = 950, estimated potential real gdp = 1000, output gap is approximately -5%.
What the result means
A negative gap means entered actual output is below the entered potential estimate.
Common questions
How should I interpret output gap?
A negative gap means entered actual output is below the entered potential estimate.
What should I check before using this result?
Potential GDP is an uncertain model estimate; this tool does not estimate it from national data.
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.