Taylor Rule Calculator

The Taylor rule is a monetary-policy guideline that links a short-term nominal policy interest rate to inflation and economic activity. It was proposed as a simple way to describe how a central bank might respond when inflation is above or below target and when the economy is growing faster or slower than its sustainable pace. The Taylor rule calculator uses an educational version of the rule: it starts with the natural real interest rate and current inflation, then adds one-half of the inflation gap and one-half of the growth gap. The result is a modeled nominal policy rate, not a forecast or a recommendation for any central bank. Inflation is the current annual rate, while the inflation target is the level the policymaker aims to achieve over time. Their difference is the inflation gap. GDP growth is compared with potential growth to form the growth gap. A positive gap raises the modeled rate; a negative gap lowers it. The natural real rate is the assumed inflation-adjusted rate consistent with stable inflation and output at potential. Adding current inflation converts that real-rate starting point into a nominal policy-rate estimate. The calculator also displays the real policy rate by subtracting the entered inflation rate from the modeled nominal rate. The traditional Taylor rule often uses an output gap rather than the difference between current and potential GDP growth. The Taylor rule calculator uses the growth fields stated in the inputs as a transparent proxy. That simplification can be useful for classroom comparisons, but it does not make growth-gap and output-gap approaches interchangeable. Estimates of potential GDP, the natural rate, and inflation itself are revised and uncertain. Central banks also use forecasts, labor-market conditions, financial stability, exchange rates, credit conditions, and risk management rather than mechanically following one formula. Use several reasonable assumptions to see how sensitive the result is. Keep inflation and growth measures on comparable annual bases and record the data source and date. A calculated rate can be negative when assumptions are weak, and that is a model output rather than an error. The Taylor rule calculator excludes policy lags, unconventional monetary policy, country-specific mandates, and real-time data revisions. It is intended for analysis and learning, not for trading, borrowing, investing, or predicting an official decision.