Okun’s Law Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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When a financial question has several moving parts, a small calculator is most useful when it stays narrow. Okun’s Law Calculator does exactly that: it uses the values shown here to answer one specific question. On this page, it uses an unemployment gap and Okun coefficient to estimate an output gap and implied GDP growth.

What this calculator does

Okun’s Law Calculator uses an unemployment gap and Okun coefficient to estimate an output gap and implied GDP growth. Its visible inputs are Unemployment rate (U), Natural unemployment rate (U*), Okun coefficient (β), Trend GDP growth (Y*). The article follows those fields and the calculation that is actually available on this page; it does not silently add live market feeds, tax tables, legal eligibility tests, or other variables that are not present in the tool.

How to use it

Enter Unemployment rate (U), Natural unemployment rate (U*), Okun coefficient (β), Trend GDP growth (Y*). Use the units and percentage scale shown beside each field, and keep values on the same time basis when the formula compares income, rates, prices, balances, or work hours.

How the calculation works

The page estimates output gap as −β × (actual unemployment rate − natural unemployment rate). It then adds that gap to the entered trend GDP growth to show an estimated actual growth rate.

Example

Using the page’s demonstration values (Unemployment rate (U) = 6; Natural unemployment rate (U*) = 4; Okun coefficient (β) = 2; Trend GDP growth (Y*) = 3) and leaving the remaining defaults unchanged, the calculator returns -4% for output gap (okun’s law). Replace the sample inputs with values from the same period and definition before interpreting your own result.

How to interpret the result

Read the result as a model of the economic relationship represented by the inputs, not as a forecast of what an economy, market, currency, or policy authority will do next. Economic data are definition-sensitive: nominal versus real values, time periods, population bases, and price indexes must be aligned before comparing results.

Limitations and notes

Simplified macroeconomic formulas hold other influences constant. Revisions to source data, measurement definitions, expectations, policy responses, market frictions, and nonlinear behavior can make real-world outcomes differ from the clean relationship shown here.