# Rate-Pressure Product Calculator (RPP) Compute RPP = HR × SBP, a non-invasive index of myocardial O₂ demand. Normal resting 6,000–10,000; >12,000 angina threshold. Derived from Gobel 1978, StatPearls, LITFL, Braunwald, Fletcher 2013. Not medical advice. > Canonical page: https://elysiatools.com/en/tools/rate-pressure-product - **Category:** Health - **Keywords:** rate pressure product, rpp, double product, myocardial oxygen demand, mvo2, systolic blood pressure, heart rate, angina, ischemia, stress testing, beta blocker, cardiology ## Overview The Rate-Pressure Product Calculator computes RPP as heart rate (HR) multiplied by systolic blood pressure (SBP). It provides a non-invasive index of myocardial oxygen demand, with results shown as RPP, RPP in thousands, and a category such as Normal RPP or High RPP. This tool is for reference and is not medical advice. ## Inputs - **Systolic BP (mmHg)** (number): Systolic blood pressure (mmHg). - **Heart Rate (bpm)** (number): Heart rate in beats per minute. - **Decimal Places** (number) ## When to use - Estimate myocardial oxygen demand from a measured heart rate and systolic blood pressure. - Review RPP values during resting measurements or exercise-stress assessment. - Compare RPP results across readings when discussing cardiovascular data with a qualified clinician. ## How it works - Enter systolic blood pressure in mmHg and heart rate in beats per minute. - The calculator applies the formula RPP = HR × SBP. - It returns the RPP, the value expressed in thousands, and an interpretation category. - Choose the number of decimal places for the formatted result, from 0 to 8. ## Use cases - Cardiology education and review of the relationship between heart rate, systolic pressure, and myocardial oxygen demand. - Exercise-stress data review using paired heart-rate and systolic-blood-pressure measurements. - Tracking changes in RPP between resting readings or other documented cardiovascular measurements. ## Frequently asked questions ### What is the Rate-Pressure Product? RPP is a non-invasive index calculated by multiplying heart rate by systolic blood pressure. ### What inputs does the calculator require? It requires systolic blood pressure in mmHg and heart rate in beats per minute. ### What does a normal resting RPP mean? A resting RPP of 6,000–10,000 is generally described as within the normal resting range. ### What does an RPP above 12,000 indicate? Values above 12,000 are associated with an angina threshold, but the result alone cannot diagnose ischemia or angina. ### Is this calculator medical advice? No. RPP results should not replace professional assessment or clinical decision-making. ## Related tools - [A-a Gradient (Alveolar-Arterial O₂)](https://elysiatools.com/en/tools/a-a-gradient-calculator): Calculate the alveolar-arterial O₂ gradient to distinguish hypoxemia causes. PAO₂ = FiO₂×(P_atm−47) − PaCO₂/0.8; A-a = PAO₂ − PaO₂. Normal ≈ (Age+10)/4. Elevated → V/Q mismatch, shunt, diffusion impairment. 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