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Healthcare quality tools
Calculators for healthcare quality professionals and CPHQ® exam candidates, built on NIST, CDC and IHI sources. Everything runs in your browser.
Health data analytics
Control charts and the statistics behind every quality dashboard.
Control chart calculator
Paste your data to get an individuals (XmR) control chart with UCL, LCL and special-cause signals, or calculate p-chart limits for a proportion.
Open toolDescriptive statistics calculator
Calculate mean, median, mode, range, standard deviation, variance, quartiles and IQR from a list of numbers, with formulas and a length-of-stay example.
Open toolSensitivity, specificity & PPV calculator
Calculate sensitivity, specificity, positive and negative predictive value and likelihood ratios from a 2×2 table, or PPV from prevalence.
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Process improvement & patient safety
Score risk and process performance the way improvement teams do.
Six Sigma calculator (DPMO)
Calculate defects per million opportunities (DPMO), process yield and sigma level from defects, units and opportunities, with the 1.5 sigma shift explained.
Open toolFMEA RPN calculator
Score failure modes by likelihood of occurrence, likelihood of detection and severity (1–10) to get the risk priority number, and rank them for action.
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Exam practice
Check where you stand before the CPHQ® exam.