Category
Biomedical Engineering
Biomedical engineering formulas and calculators for biomechanics and physiological systems modeling used in medical devices and human movement analysis. Includes tissue mechanics, body fluid dynamics, and biosignal equations.
22Formulas
2Subcategories
Updated Jul 2026
General
Glasgow Coma Scale Total Score
GCS = Eye + Verbal + Motor
General
TENS Unit Duty Cycle
Duty cycle (%) = (Pulse width / Pulse period) * 100
General
Medical Device Battery Life Estimate
Life (hr) = Battery capacity (mAh) / Device draw (mA)
General
Ultrasound Axial Resolution
Axial resolution = SPL / 2
General
Pulse Oximeter Perfusion Index
PI = (AC / DC) * 100
General
Insulin Pump Basal Rate
Basal rate (units/hr) = TDD * 0.5 / 24
General
Defibrillator Pediatric Energy Dose
Energy (J) = 2 to 4 J/kg * mass (kg)
General
Hearing Aid Gain
Gain (dB) = Output SPL - Input SPL
General
Hearing Threshold Level Conversion
dB HL = SPL(dB) - Reference SPL at that frequency
General
Effective Radiation Dose (Simplified)
E = D * WT
General
Radiographic Exposure (mAs)
mAs = mA * time(s)
Biomechanics
Prosthetic Socket Interface Pressure
P = F / A
Biomechanics
Wheelchair Ramp Slope Ratio
Slope = Rise / Run (ADA max = 1:12)
Biomechanics
Compression Stocking Pressure Gradient
Gradient = P_ankle - P_calf
General
Body Temperature Conversion (°F to °C)
°C = (°F - 32) * 5/9
General
Blood Glucose Unit Conversion
mmol/L = mg/dL / 18.0
General
Nebulizer Medication Dose
Dose (mg) = Concentration (mg/mL) * Volume (mL)
Physiological Systems
Ventilator Tidal Volume (Lung-Protective)
VT = IBW * 6 (to 8) mL/kg
General
Oxygen Cylinder Duration
Duration (min) = (Cylinder_PSI - Safety_PSI) * Conversion_factor / Flow_rate
Physiological Systems
IV Drip Rate (Gravity Infusion)
Drip rate (gtt/min) = (Volume_mL * Drop_factor) / Time_min
Physiological Systems
Poiseuille's Law
Q = πΔPr⁴ / (8ηL)
Biomechanics
Young's Modulus (Tissue)
E = σ / ε