Medical & clinical
Clinical reference calculations — dosing, scores and growth percentiles — for orientation, never diagnosis. 17 tools, including Blood alcohol calculator, Blood Donation Time Calculator, Blood Pressure Category Calculator and Blood Sugar Converter (mg/dL ↔ mmol/L). All free, with no account and nothing to install.
Blood alcohol calculatorEstimate your blood alcohol concentration (BAC) with the Widmark formula.Blood Donation Time CalculatorFind your next eligible donation date by donation type, using either the American Red Cross or the French EFS intervals.Blood Pressure Category CalculatorClassify a reading with the ACC/AHA 2017 or the European ESC/ESH scale, plotted on a chart, with mean arterial pressure and pulse pressure.Blood Sugar Converter (mg/dL ↔ mmol/L)Convert blood glucose between mg/dL and mmol/L in both directions, and see where the value falls against the ADA reference bands.Blood Type CalculatorPredict a child's possible ABO and Rh blood types, with probabilities, from both parents' blood groups.BMR calculatorEstimate your Basal Metabolic Rate (Mifflin-St Jeor).Body surface area calculatorCompute your body surface area (BSA) with the five published formulas — Mosteller, Du Bois, Haycock, Gehan & George and Boyd — side by side.Corrected calcium calculatorLow albumin makes total calcium read artificially low. The Payne correction adjusts it: corrected = measured + 0.8 × (4.0 − albumin), giving a value closer to the physiologically active calcium.Corrected sodium calculatorHigh blood glucose pulls water into the blood and dilutes sodium, so the measured value understates the true level. This adds it back both standard ways — Katz (1.6) and Hillier (2.4) per 100 mg/dL of glucose above 100.HbA1c Calculator (A1c ↔ eAG)Enter HbA1c, average glucose in mg/dL or in mmol/L and get the other two, plus the IFCC value in mmol/mol.Heart Disease Risk CalculatorEstimate your 10-year risk of heart attack and stroke with the 2013 ACC/AHA Pooled Cohort Equations (ASCVD), from age, sex, cholesterol, blood pressure and risk factors.Insulin Sensitivity Factor CalculatorEstimate your correction factor from the total daily dose with the 1500/1700/1800/2000 rule, in mg/dL or mmol/L, plus an optional correction dose.Life expectancy calculatorEstimate your remaining years from a baseline lifespan.Max heart rate calculatorFind your max heart rate and training zones.Weight-based medication dosage calculatorTurns a weight-based prescription into a concrete amount: from body weight, the dose in mg per kg and — for a liquid — the concentration in mg per ml, it works out the milligrams and millilitres per dose and the total per day. An arithmetic aid only, never a substitute for a clinician.Pack-years calculatorCompute your smoking pack-years from packs per day and years smoked.Resting heart rate calculatorClassify your resting heart rate (RHR) as low, normal or elevated.