Medical & Clinical calculators (21)

Published clinical formulas and scores: eGFR, creatinine clearance, LDL, anion gap, corrected calcium and sodium, A1C, QTc, MELD, CHA₂DS₂-VASc, Wells, fluids, drip rates, unit conversions. Informational only.

Markdown version: /medical.md · JSON: /api/v1/calculators?category=medical

• eGFR Calculator — Estimates glomerular filtration rate from serum creatinine, age and sex with the CKD-EPI 2021 race-free creatinine equation, and assigns the KDIGO GFR category (G1–G5). (md · api)
• Creatinine Clearance Calculator — Estimates creatinine clearance in mL/min with the Cockcroft-Gault equation from age, weight, sex and serum creatinine, and, when height is given, also reports the values using ideal (Devine) and adjusted body weight. (md · api)
• LDL Cholesterol Calculator — Calculates LDL cholesterol from total cholesterol, HDL and triglycerides with the Friedewald equation (mg/dL or mmol/L), plus non-HDL cholesterol and the NCEP LDL category. (md · api)
• Anion Gap Calculator — Computes the serum anion gap from sodium, chloride and bicarbonate, optionally including potassium, and the albumin-corrected gap (Figge) for hypoalbuminaemia. (md · api)
• Corrected Calcium Calculator — Adjusts total serum calcium for low or high albumin with the Payne formula, in conventional (mg/dL, g/dL) or SI units (mmol/L, g/L), and reports both unit systems. (md · api)
• Corrected Sodium Calculator — Corrects measured serum sodium for the dilutional effect of hyperglycaemia using the Katz 1.6 mmol/L and Hillier 2.4 mmol/L factors per 100 mg/dL of glucose above 100 mg/dL. (md · api)
• A1C to Average Glucose Calculator — Converts HbA1c (%) to estimated average glucose in mg/dL and mmol/L with the ADAG study equation, or an average glucose back to A1C, and reports the IFCC value in mmol/mol. (md · api)
• QTc Calculator — Corrects a measured QT interval for heart rate with the Bazett, Fridericia, Framingham and Hodges formulas and flags prolongation against the sex-specific thresholds (450 ms men, 460 ms women). (md · api)
• MELD Score Calculator — Computes the Model for End-Stage Liver Disease score from bilirubin, INR and creatinine (with the OPTN bounding and rounding rules) and MELD-Na when sodium is supplied, and reports the observed 3-month mortality band from Wiesner 2003. (md · api)
• CHA₂DS₂-VASc Score Calculator — Scores stroke risk in non-valvular atrial fibrillation from age, sex, heart failure, hypertension, diabetes, prior stroke/TIA and vascular disease, and reports the adjusted annual stroke rate from the Euro Heart Survey (Lip 2010) plus the sex-free CHA₂DS₂-VA score. (md · api)
• Wells Score for DVT Calculator — Sums the Wells clinical criteria for suspected deep vein thrombosis and reports the three-tier (low/moderate/high) and two-tier (unlikely/likely) pretest probability categories. (md · api)
• Parkland Formula Calculator — Calculates the first 24-hour crystalloid volume for burn resuscitation from body weight and percent total body surface area burned (4 mL × kg × %TBSA), split into the first 8 hours and the next 16 hours with hourly rates. (md · api)
• Maintenance Fluids Calculator — Calculates maintenance fluid requirements from body weight with the Holliday-Segar method: the hourly 4-2-1 rule and the daily 100-50-20 mL/kg volume, plus the NICE 25–30 mL/kg/day adult range. (md · api)
• Pack-Years Calculator — Converts a smoking history into pack-years (packs per day × years smoked, 20 cigarettes per pack) and notes the USPSTF lung-cancer screening threshold of 20 pack-years. (md · api)
• IV Drip Rate Calculator — Converts an infusion volume and duration into a gravity drip rate in drops per minute for a given tubing drop factor, and the equivalent pump rate in mL per hour. (md · api)
• Oxygen Tank Duration Calculator — Estimates how long a compressed-gas oxygen cylinder will last from its gauge pressure, size-specific conversion factor (litres per psi), a safe residual pressure and the flow rate. (md · api)
• Glucose Unit Converter — Converts blood glucose between mg/dL (US) and mmol/L (SI) using the molar mass of glucose (1 mmol/L = 18.016 mg/dL, i.e. mg/dL × 0.0555). (md · api)
• Cholesterol Unit Converter — Converts total, HDL, LDL or non-HDL cholesterol (factor 0.02586) and triglycerides (factor 0.01129) between mg/dL and mmol/L. (md · api)
• Vitamin IU Converter — Converts international units to mass and back for vitamin D (1 µg = 40 IU), vitamin A as retinol (1 IU = 0.3 µg) and vitamin E as natural d-alpha-tocopherol (1 IU = 0.67 mg) or synthetic dl-alpha-tocopherol (1 IU = 0.9 mg by mass, 0.45 mg alpha-tocopherol equivalents for RDA purposes). (md · api)
• Adjusted Body Weight Calculator — Computes ideal body weight (Devine) and adjusted body weight (IBW + 0.4 × (actual − IBW)) used for drug dosing and creatinine clearance in people whose weight exceeds 120% of ideal. (md · api)
• Dose by Weight Calculator — Converts a weight-based dose (mg/kg per dose or per day) into milligrams per administration and per day, the volume per administration for a given concentration, and applies an optional maximum single dose. (md · api)