Endocrinology Calculators
35 calculators & risk scores
Browse 35 Endocrinology clinical calculators and risk scores used in everyday UK practice. Every tool runs entirely in your browser — enter the values and get instant scoring, colour-coded interpretation bands and a link to the underlying guideline or publication. ClinCalc Pro is free, needs no sign-up, and is built for working clinicians.
These endocrinology tools span Diabetes, Medications, Electrolytes, Obesity, Thyroid, Prognosis and more.
- HbA1c ConverterInterprets HbA1c in mmol/mol (IFCC). Classifies diabetes control and identifies diagnostic thresholds.
- DKA Severity ClassificationClassifies diabetic ketoacidosis severity using pH, bicarbonate, and blood ketone levels.
- Steroid Dose EquivalenceConverts corticosteroid doses to prednisolone equivalent. Useful for switching steroids or assessing adrenal suppression risk.
- Corrected Sodium (Hyperglycaemia)Corrects serum sodium for the dilutional effect of hyperglycaemia to reveal true sodium status.
- BMI + Metabolic Risk AssessmentCombined BMI and waist circumference assessment for metabolic risk classification.
- Insulin TDD EstimatorEstimates total daily dose (TDD) of insulin for new insulin starts. 50% basal, 50% bolus split.
- Thyroid Function InterpreterInterprets TSH and free T4 pattern to classify thyroid function status.
- FINDRISC — Diabetes Risk ScoreFinnish Diabetes Risk Score for predicting 10-year risk of developing type 2 diabetes.
- HOMA-IR — Insulin ResistanceHomeostatic Model Assessment of Insulin Resistance. HOMA-IR = (Fasting Glucose × Fasting Insulin) / 22.5.
- Metabolic Syndrome Criteria (IDF 2006)IDF 2006 criteria for metabolic syndrome. Central obesity is required plus ≥2 of 4 additional criteria.
- Rotterdam PCOS CriteriaRotterdam 2003 diagnostic criteria for Polycystic Ovary Syndrome. Requires 2 of 3 criteria after exclusion of other aetiologies.
- UK Prospective Diabetes Study (UKPDS) Risk EngineSimplified UKPDS-based cardiovascular risk factors guide in T2DM. Score used to prioritise treatment intensity.
- Burch-Wartofsky Point Scale for ThyrotoxicosisScoring system for diagnosing thyroid storm (thyrotoxic crisis) and guiding treatment urgency. Score ≥ 45 is diagnostic of thyroid storm.
- Ideal & Adjusted Body WeightCalculates Ideal Body Weight (Devine formula) and Adjusted Body Weight for use in drug dosing, ventilator settings, and nutrition.
- Adrenal Insufficiency AssessmentClinical and biochemical assessment for primary (Addison's disease) and secondary adrenal insufficiency, including adrenal crisis risk.
- AUSDRISK — Australian Type 2 Diabetes Risk Tool10-item validated risk assessment tool for identifying Australians at high risk of developing type 2 diabetes within 5 years. Also used internationally. Score ≥12 = high risk. Equivalent to FINDRISC adapted for Australian population.
- Edmonton Obesity Staging System (EOSS)5-stage clinical staging system for obesity that incorporates comorbidities, functional limitations, and wellbeing — beyond BMI alone. Guides treatment intensity. Stage 0 = no complications; Stage 4 = end-stage complications.
- Relative Fat Mass (RFM) CalculatorSimple anthropometric formula estimating body fat percentage using height and waist circumference. More accurate than BMI for predicting body fat. Males: RFM = 64 − (20 × height/waist). Females: RFM = 76 − (20 × height/waist).
- CANRISK — Canadian Diabetes Risk Questionnaire8-item validated questionnaire for screening pre-diabetes and undiagnosed type 2 diabetes in Canadian adults ≥40 years. Score ≥21 = high risk. Similar to FINDRISC/AUSDRISK but adapted for Canadian population including Aboriginal and South Asian groups.
- Glucose Infusion Rate (GIR) CalculatorCalculates glucose infusion rate in mg/kg/min from IV infusion parameters. Critical for neonatal and paediatric care, and for insulin infusion management in adults. Confirms adequate glucose delivery.
- Harris-Benedict Equation — Resting Energy ExpenditureEstimates basal/resting energy expenditure (REE/BEE) in kcal/day using age, weight, height, and sex. Total Daily Energy Expenditure (TDEE) = REE × activity factor. Widely used for nutrition planning in clinical and outpatient settings.
- Insulin Correction Factor (ICF/ISF)Estimates how much 1 unit of rapid-acting insulin will lower blood glucose. Calculated using 'Rule of 1700' (mmol/L) or 'Rule of 1800' (mg/dL) divided by Total Daily Dose (TDD). Used for correction bolus dosing in type 1 and type 2 diabetes.
- Weight-Based Levothyroxine Dose CalculatorEstimates starting levothyroxine dose for hypothyroidism based on lean body weight and severity. Target dose for primary hypothyroidism: 1.6 mcg/kg/day. Lower in elderly (0.8–1.0 mcg/kg) and cardiac disease (12.5–25 mcg start).
- C-Peptide to Glucose RatioFasting C-peptide to fasting glucose ratio helps distinguish type 1 from type 2 diabetes and assesses residual beta-cell function. Low ratio suggests type 1 or insulin deficiency; high ratio suggests type 2 or insulin resistance.
- Burch-Wartofsky Score (Thyroid Storm)Quantifies likelihood of thyroid storm (thyrotoxic crisis). Score >= 45 = thyroid storm; 25-44 = impending storm.
- Diabetes Sick Day Risk AssessmentIdentifies diabetic patients at risk of DKA or HHS during illness. Guides sick day rule application and hospital admission.
- Cushing Syndrome Probability ScoreEstimates clinical likelihood of Cushing syndrome to guide biochemical testing (24h UFC, LNSC, LDDST).
- Acromegaly Diagnosis Score (SAGIT)Structured scoring tool for acromegaly diagnosis and disease activity assessment using clinical signs, IGF-1, GH, and complications.
- Adrenal Crisis Risk ScoreIdentifies patients at risk of adrenal crisis (adrenocortical insufficiency during physiological stress). Guides sick day rule for hydrocortisone.
- Pheochromocytoma Clinical Probability (10% Rule)Assesses clinical probability of pheochromocytoma/paraganglioma. Often called the "10% tumor" for its prevalence in syndromic contexts.
- Hypoglycaemia Severity ClassificationClassifies hypoglycaemia severity to guide acute management (rule of 15/20) and prevention strategy.
- Thyroid Function Test InterpretationSystematically interprets TSH + free T4 patterns to identify hypothyroid, hyperthyroid, subclinical, and central thyroid disease. Guides management decisions.
- ACR TI-RADS — Thyroid Imaging Reporting & Data SystemAmerican College of Radiology TI-RADS (2017) for risk-stratifying thyroid nodules on ultrasound. Sum 5 features → TR1–TR5 with FNA size thresholds.
- Wagner-Meggitt Classification of Diabetic Foot UlcersClassic 6-grade classification of diabetic foot ulcers based on depth and ischaemia (Meggitt 1976; Wagner 1981). Drives debridement, antibiotic and amputation decisions. Complemented by University of Texas system (which also grades infection and ischaemia).
- SINBAD Score for Diabetic Foot UlcerSimple 6-domain diabetic-foot ulcer classification (Ince 2008) — recommended by IWGDF for international comparison. Each domain 0/1; total 0–6.