Quirkulator

Clinical Index Calculators

12 calculators covering blood pressure, renal function and similar indices, each with its formula and worked examples.

Clinical Index Calculators brings together 12 calculators for blood pressure, renal function and similar indices, including Apgar Score Calculator, Child Height Prediction Calculator, Glasgow Coma Scale Calculator and Pregnancy Due Date Calculator.

Each calculation gets its own page, with its own inputs, its own worked examples and its own explanation of what the answer means. The formula is printed on the page rather than hidden in the code, so a result you disagree with can be argued with rather than merely distrusted.

All 12 pages compute in your browser: nothing you type is sent anywhere, and results update as you edit. Each one carries worked examples, interpretation bands where a score needs context, and a FAQ answering what people actually ask about that calculation.

The collection is part of Health & Fitness, and every page links to the neighbouring calculations you usually need next.

12 pages in this collection

Apgar Score CalculatorThe five-component newborn assessment devised by Virginia Apgar, scored zero to two each.Blood Pressure Category CalculatorWhere a reading falls under both the ACC/AHA 2017 categories and the NICE clinic thresholds.Child Height Prediction CalculatorPredicted adult height from parental heights using the mid-parental method.Creatinine Clearance CalculatorCockcroft-Gault creatinine clearance, still the basis for many drug dosing recommendations.eGFR CalculatorEstimated glomerular filtration rate from serum creatinine using the 2021 race-free CKD-EPI equation.Glasgow Coma Scale CalculatorThe eye, verbal and motor components of the GCS, totalling between three and fifteen.Mean Arterial Pressure CalculatorAverage pressure across the cardiac cycle, weighted for the time spent in diastole.Ovulation Window CalculatorThe fertile window from cycle length, based on the fixed length of the luteal phase.Pregnancy Due Date CalculatorEstimated due date from the last menstrual period using Naegele's rule, adjusted for cycle length.Pulse Pressure CalculatorThe gap between systolic and diastolic pressure, and what a wide or narrow gap indicates.QTc CalculatorCorrected QT interval by the Bazett and Fridericia formulas, with the Framingham and Hodges variants.Sleep Cycle Bedtime CalculatorBedtimes that let you wake at the end of a sleep cycle rather than in the middle of one.

Related collections

Health & Fitness →
Nutrition & Energy Calculators19 calculators covering metabolic rate, energy needs and macros, each with its formula and worked examples.19 calculatorsTraining Calculators15 calculators covering pace, race prediction, VO₂ max and heart-rate zones, each with its formula and worked examples.15 calculatorsBody Metric Calculators14 calculators covering BMI and the other body composition indices, each with its formula and worked examples.14 calculators