Nephrology calculators for kidney function, eGFR, electrolytes, and dialysis. Designed for nephrologists, clinicians, and medical students.
Medical Calculator – SonDoctor.com × Electrolyte free water clearance (EFWC) Calculator EFWC = UV x (1-((Urine Na + Urine K) / Plasma Na)) UV : Urine flow rate (L/day) * If the 24-hour urine volume is not entered, only a POSITIVE or NEGATIVE result will be provided. Urine Na (mEq/L): Urine K (mEq/L): Plasma Na … Read more
Medical Calculator – SonDoctor.com × Free water clearance (FWC) Calculator FWC = UV x (1-(U osm / P osm)) UV : Urine flow rate (L/day) * If the 24-hour urine volume is not entered, only a POSITIVE or NEGATIVE result will be provided. Urine Osm (mOsm/kg): Plasma Osm (mOsm/kg): [Optional] 24hr Urine Volume (L/day): FWC … Read more
Medical Calculator – SonDoctor.com × Free Water Deficit Calculator in Hypernatremia Male: ((Measured Na – 140) / 140 ) × 0.6 × Weight(kg) Female: ((Measured Na – 140) / 140 ) × 0.5 × Weight(kg) Measured Serum Sodium (mmol/L) : Target Serum Sodium (mmol/L) : Body weight (kg) : Male | Female
Medical Calculator – SonDoctor.com × Total Sodium Deficit Calculator in Hyponatremia Male: (Desired Na – Measured Na) × 0.6 × Weight(kg) Female: (Desired Na – Measured Na) × 0.5 × Weight(kg) Measured Serum Sodium (mmol/L) : Target Serum Sodium (mmol/L) : Body weight (kg) : Male | Female *Normal saline 1L contains 154 mEq of … Read more
Medical Calculator – SonDoctor.com × HUGE (Hematocrit + Blood urea + GEnder) Calculator This calculator helps differentiate between normal aging kidney and chronic kidney disease (CKD) in patients over 70 using the HUGE formula: L = 2.505458 – [0.264418 x Hct] + [0.118100 x Urea] [+ 1.383960 if male] Hematocrit (%) : Serum Urea (mg/dL) … Read more
Medical Calculator – SonDoctor.com × Transferrin Saturation Calculator T.sat (%) = (Fe / TIBC) x 100 Serum Fe (mcg/dL) : Serum TIBC (mcg/dL) :
Medical Calculator – SonDoctor.com × Albumin to Globulin (A/G) Ratio Calculator A/G ratio = Albumin / (Total protein – Albumin) Calculated globulin = Total protein – Albumin Total Protein (g/dL) : Albumin (g/dL) : Normally, albumin is slightly higher than globulin, so A/G ratio is slightly over 1. When A/G ratio is less than 1, … Read more
Medical Calculator – SonDoctor.com × CRRT Dose Calculator CRRT dose = (Dialysate flow + Replacement flow + Patient Removal) / Bwt The recommended dose is typically 20–40 mL/kg/hr, often starting at around 35 mL/kg/hr. Body weight (kg) : Dialysate flow (mL/hr) : Replacement flow (mL/hr) : Patient Removal flow (mL/hr) :
Medical Calculator – SonDoctor.com × Corrected Sodium in Hypertriglyceridemia Corrected Na (mEq/L) = Na + [{(0.21 x (TG(mg/dL) / 100)} – 0.6 ] x (Na / 100) Serum Sodium (mEq/L) : Serum Triglycerides (mg/dL) : Reference : Dimeski G, Mollee P, Carter A. Effects of hyperlipidemia on plasma sodium, potassium, and chloride measurements by an … Read more
Medical Calculator – SonDoctor.com × Calculate Fractional Excretion of Multiple Electrolytes Quickly calculate fractional excretion (FE) of various electrolytes. Serum Creatinine and Urine Creatinine are required. Enter any electrolyte values (serum/urine) to calculate its FE. [ Blood chemistry ] Serum Creatinine (mg/dL) : Serum Sodium (mmol/L) : Serum Chloride (mmol/L) : Serum Urea (mg/dL) : … Read more