GFR Calculator

GFR Calculator for Adults¹ (patients 18 and older)

Age:

Serum creatinine:
(Lab work results will have this number)
.

Gender:

Race:

Early diagnosis and intervention are critical to patient well-being and longevity when living with Chronic Kidney Disease. The National Kidney Foundation and the American Diabetes Association have determined that GFR is the best overall index of the level of kidney function and allows a physician to properly stage a patient with Chronic Kidney Disease.

When should a referral be made to a nephrologist?

A patient with a GFR of 59 or lower (Stage 3, 4 & 5).
Early Stage 1 and 2 referrals may also be beneficial in patients with chronic illnesses such as diabetes and hypertension in order to limit or prevent end-organ complications or as determined by the PCP.

Chronic Kidney Disease Stage	Description	GFR Value	Clinical Action
Stage 1	Kidney damage with normal or increased GFR	>=90 mL/min/1.73 m²	Diagnosis and treatment; Treating comorbid conditions; Slowing progression; Reducing risk of cardiovascular disease
Stage 2	Kidney damage with mild decrease in GFR	60 to 89 mL/min/1.73 m²	Estimating progression
Stage 3	Moderate decrease in GFR	30 to 59 mL/min/1.73 m²	Evaluating and treating complications
Stage 4	Severe decrease in GFR	15 to 29 mL/min/1.73 m²	Preparing for kidney replacement therapy
Stage 5	Kidney failure	<15 mL/min/1.73 m²	Replacement therapy (if uremia present)

How will SKI manage the patient?

Stage 3 patients are introduced to our Kidney Disease Education, Prevention, and Treatment program (K-DEPT). The goal of K-DEPT is to slow the progression of CKD and delay the onset of End Stage Renal Disease (ESRD) by evaluating and treating complications related to CKD. Here patients meet with the nephrologist to develop a treatment plan that includes nutrition services, social services, hypertension management, anemia management and diabetes education. SKI does not provide primary care physician services; all primary care services are referred back to the PCP.
Stage 4 and 5 patients are managed through the K-DEPT program and educated on renal replacement therapy modalities. Modalities include transplant, peritoneal dialysis, hemodialysis (in-center or home therapy), or no renal replacement therapy. When indicated, the patient has a dialysis access placed and is prepared for the initiation of dialysis without hospitalization.

¹GFR (mL/min/1.73 m²) = 186 x Serum Creatinine^-1.154 x Age^-0.203 x 0.742 (if female) x 1.210 (if black). The equation does not require weight because the results are reported normalized to 1.73 m² body surface area which is an accepted average adult surface area.