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Estimators

Formula-based estimates (e.g. BSA, eGFR, BMR) & approximations, not measured values.

Metabolic

Body Surface Area

Estimates body surface area using the Mosteller formula.

Ideal Body Weight

Estimates ideal body weight using the Devine formula.

Basal Metabolic Rate

Estimates basal metabolic rate using the Mifflin-St Jeor equation.

Adjusted Body Weight

Estimates adjusted body weight for dosing in obese patients, using actual and ideal body weight.

Estimated Calorie Requirement (TDEE)

Estimates total daily energy expenditure from BMR and activity level.

Renal

Creatinine Clearance (Cockcroft-Gault)

Estimates creatinine clearance using the Cockcroft-Gault equation.

eGFR (CKD-EPI 2021)

Estimates glomerular filtration rate using the race-free 2021 CKD-EPI creatinine equation.

eGFR (MDRD)

Estimates glomerular filtration rate using the race-free 4-variable MDRD equation.

Clinical Chemistry

LDL Cholesterol (Friedewald)

Estimates LDL cholesterol from total cholesterol, HDL, and triglycerides.

VLDL Estimation

Estimates VLDL cholesterol from triglycerides.

Estimated Serum Osmolality

Estimates serum osmolality from sodium, glucose, and BUN, with an optional osmolar gap if measured osmolality is known.

HbA1c ↔ Estimated Average Glucose

Converts between HbA1c and estimated average glucose (eAG) using the ADAG study formula.

Corrected Sodium for Hyperglycemia

Estimates corrected sodium from measured sodium and glucose using an explicitly selected correction factor.

Hematology

Hematocrit Estimation

Estimates hematocrit from hemoglobin using the commonly cited 'rule of three'.

Microbiology

CFU/mL Estimation

Estimates colony-forming units per mL from a plated colony count.