eGFR Calculator

Estimate eGFR from creatinine and the demographic inputs required by the equation. Enter your own values below to see estimated GFR and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

2021 CKD-EPI creatinine equation without a race coefficient. Adult, stable-creatinine estimate.

Before you use the result

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.

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What is eGFR Calculator?

eGFR Calculator helps you estimate eGFR from creatinine and the demographic inputs required by the equation.

The main result is estimated GFR. The formula, example and assumptions below explain how to interpret it.

How to use eGFR Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather age, serum creatinine (mg/dL) and sex used in the formula. Use values from the same situation or reporting period.
  2. Replace the example age with your own value, then complete the other fields. Check the displayed units and each selected option.
  3. Select Calculate and read estimated GFR. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter age, at least 18 and at most 100. Use a whole number.
  • Enter serum creatinine in mg/dL, at least 0.1 and at most 20. Decimals are accepted.
  • Choose sex used in the formula from Male and Female.

eGFR Calculator: a worked example

With the inputs below, the result is 91.691479 mL/min/1.73 m² (estimated GFR). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Age50
Serum creatinine (mg/dL)1 mg/dL
Sex used in the formulaMale
Estimated GFR91.691479 mL/min/1.73 m²

Understanding the eGFR result

The main output is estimated GFR, expressed in mL/min/1.73 m². It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

eGFR Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.
  • Health estimates are context-dependent. Age, pregnancy, illness, medication and individual measurements can affect interpretation; these tools do not diagnose a condition.

For wider guidance, visit World Health Organization. The formula and scope of this specific tool are stated on this page.

eGFR Calculator FAQs

What does eGFR Calculator calculate?

eGFR Calculator helps you estimate eGFR from creatinine and the demographic inputs required by the equation. Its main output is estimated GFR in mL/min/1.73 m².

What inputs do I need for eGFR Calculator?

You need age, serum creatinine (mg/dL) and sex used in the formula. Use the field labels and units to match your figures to the formula.

Which formula does eGFR Calculator use?

2021 CKD-EPI creatinine equation without a race coefficient. Adult, stable-creatinine estimate.

What is a worked example for eGFR Calculator?

Example inputs: Age: 50; Serum creatinine: 1 mg/dL; Sex used in the formula: Male. The result is 91.691479 mL/min/1.73 m² (estimated GFR).

How should I enter age?

Enter age, at least 18 and at most 100. Use a whole number.

How do I choose sex used in the formula?

Choose sex used in the formula from Male and Female. The example uses Male; replace it if your circumstances differ.

How should I read estimated GFR?

The main output is estimated GFR, expressed in mL/min/1.73 m². It applies to the inputs and operation you selected.

Why might my eGFR Calculator result differ from my records?

Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in eGFR Calculator?

Yes. Note your first estimated GFR, change age or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is eGFR Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.