Duke Treadmill Score Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

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Cardiovascular numbers become useful only when the equation behind them is clear. Duke Treadmill Score Calculator turns the specific measurements in this tool into a focused hemodynamic or risk estimate.

What this calculator does

Duke Treadmill Score Calculator uses Exercise duration, Maximum ST-segment deviation, and Angina index to calculate Duke Treadmill Score. It is built around the exact fields displayed in this plugin rather than a generic version of the topic. Cardiovascular formulas are sensitive to measurement technique and clinical context. A mathematically correct output can still be misleading if the input was obtained under a different physiologic condition, with a different assay, or outside the population for which the score was developed.

How to use it

Enter or select Exercise duration, Maximum ST-segment deviation, and Angina index. Use the units offered by the calculator and choose the option that matches the actual clinical or timing situation. Check date entries and laboratory units before relying on the output. When the formula combines measurements, use values obtained under the same assessment or physiologic conditions whenever possible.

How the calculation works

The Duke Treadmill Score is exercise time in minutes − 5 × maximal ST-segment deviation in millimeters − 4 × the angina index. In this calculator, scores of 5 or more are labeled low risk, −10 through 4 intermediate risk, and below −10 high risk.

Example

Using the sample values prefilled in this calculator, the primary result is 4 points (Intermediate-risk range). This worked example shows how the plugin’s own default inputs flow through the implemented method; replace them with the correct patient, laboratory, imaging, or personal values before interpreting a result.

How to interpret the result

The tool labels 5 or above low risk, −10 through 4 intermediate, and below −10 high risk. A treadmill score is interpreted alongside symptoms, exercise capacity, ECG quality, pretest probability, and whether the patient achieved an adequate workload and heart-rate response.

Limitations and notes

Cardiovascular formulas are sensitive to measurement technique and clinical context. A mathematically correct output can still be misleading if the input was obtained under a different physiologic condition, with a different assay, or outside the population for which the score was developed.