Wellness estimates

GFR Calculator

Estimate your Glomerular Filtration Rate (eGFR) to assess kidney function using the CKD-EPI formula. Use this Health estimates tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
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How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

eGFR estimates how well kidneys filter waste. Normal eGFR is ≥60 mL/min/1.73m². The CKD-EPI equation is based on serum creatinine, age, sex, and race. Always confirm with a physician.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is a normal GFR?

A GFR of 90+ is normal. 60–89 indicates mildly reduced function. Below 60 for 3+ months indicates chronic kidney disease (CKD). Below 15 is kidney failure.