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MediCalc
Clinical 2026

Clinical & Healthcare Formula Calculators

Precision point-of-care medical formulas, dosage calculations, and physiological indices for doctors, nurses, paramedics, and medical students.

🔍
⚖️ Body Mass Index (BMI)
Body

Quetelet's index and BMI Prime for classifying underweight, normal, overweight, or obesity.

BMI & WHO Classification
22.86 kg/m²
Normal Weight (Prime: 0.91)
📐 Body Surface Area (BSA)
Body

Mosteller & DuBois formulas for precise chemotherapy, cardiac index, and drug dosing.

Body Surface Area (Mosteller)
1.84 m²
DuBois Formula: 1.85 m²
🧍 Ideal & Adjusted Weight (IBW)
Body

Devine formula calculation of IBW and Adjusted Body Weight (ABW) for clinical ventilator/drug dosing.

Ideal Body Weight (Devine)
70.5 kg
Adjusted Body Weight (ABW 40%): 70.5 kg
💓 Mean Arterial Pressure (MAP)
Cardio

Perfusion pressure index for vital organs. Vital organ perfusion threshold is MAP ≥ 65 mmHg.

Calculated MAP
93.3 mmHg
Pulse Pressure: 40 mmHg (Adequate Perfusion)
❤️ Target Heart Rate (Karvonen)
Cardio

Heart rate training and cardiovascular rehabilitation intensity zones based on heart rate reserve.

Aerobic Target Zone (60% - 80%)
142 - 166 BPM
Max HR: 190 BPM | HR Reserve: 120 BPM
🩸 Lipid Profile & Atherogenic Ratio
Cardio

Total Cholesterol to HDL ratio and Non-HDL cholesterol assessment for cardiovascular risk stratification.

Total / HDL Ratio
4.0 : 1
Average Risk (< 5.0 optimal for general population)
🧪 Kidney Function (eGFR CKD-EPI)
Renal

Estimated Glomerular Filtration Rate (2021 CKD-EPI creatinine equation) for staging kidney disease.

Estimated GFR
98 mL/min/1.73m²
Stage 1: Normal or High GFR
💧 IV Infusion Drip Rate
Renal

Calculate drops per minute (gtt/min) for gravity IV sets and hourly infusion volume rate (mL/hr).

Required Flow Rate
42 gtt/min
Continuous Rate: 125.0 mL/hr
🍼 Maintenance Fluids (Holliday-Segar)
Renal

Standard 4-2-1 rule for calculating daily baseline water and electrolyte requirements by body weight.

Fluid Rate (4-2-1 Rule)
65.0 mL/hr
Total 24h Volume: 1,600 mL/day
🤰 Pregnancy Due Date (Naegele's)
OB/GYN

Naegele's rule for Estimated Due Date (EDD) and current gestational age based on Last Menstrual Period.

Estimated Date of Delivery (EDD)
Select LMP Date
40 Weeks Gestation (+280 Days)
🧠 Glasgow Coma Scale (GCS)
Trauma

Neurological scale scoring eye, verbal, and motor responsiveness for acute traumatic brain injury.

Total GCS Score
15 / 15
Mild / Normal (E4 V5 M6)