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eGFR Calculator

Health & Body

CKD-EPI 2021 equation, CKD staging

Quick Answer

eGFR Calculator: CKD-EPI 2021 equation, CKD staging. eGFR Calculator uses standard health formulas to compute accurate results instantly.

eGFR (CKD-EPI 2021)

92

mL/min/1.73m² · Stage G1（Normal/high (needs damage evidence)）

Creatinine (mg/dL)1.00
CKD stageG1
Kidney function≈77%
Recheck adviceAnnual

GFR stages

G5
G4
G3b
G3a
G2
G1

eGFR 92 → G1

Steps

  1. 1Convert: 88 μmol/L ÷ 88.4 = 1.00 mg/dL
  2. 2Male: 142 × min(Scr/0.9,1)^-0.302 × max(Scr/0.9,1)^-1.2 × 0.9938^50
  3. 3eGFR = 92.2 mL/min/1.73m² → G1
  4. 4G1/G2 alone ≠ CKD — diagnosis also needs damage markers (proteinuria, imaging, ≥3 months)

KDIGO GFR categories

G1 ←≥90Normal/high (needs damage evidence)
G260-89Mildly decreased
G3a45-59Mild-moderate
G3b30-44Moderate-severe
G415-29Severely decreased
G5<15Kidney failure

💡 This uses the 2021 CKD-EPI equation (race-free). eGFR naturally declines with age — a stable 85 in an 80-year-old is normal aging, not disease. Creatinine-based eGFR is unreliable with unusual muscle mass (bodybuilders, amputees) or acute kidney injury; cystatin C is the next step. One abnormal reading needs a repeat in 3 months before any CKD label.

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How to Use

  1. Enter body metrics: fill height, weight, age etc. as prompted by the eGFR Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

  • eGFR Calculator is a free online health tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: CKD-EPI 2021 equation, CKD staging.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

eGFR Calculator formula

eGFR Calculator uses standard health formulas to compute accurate results instantly.

FAQ

How do I use the eGFR Calculator?
Open the page and fill in the input fields — results update automatically. CKD-EPI 2021 equation, CKD staging.
Are the results accurate?
Results follow published international standards (WHO, ACE, IOM) and are for reference only.
Can this replace medical advice?
No. Always consult a qualified healthcare professional for health decisions.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on all devices.

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Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. eGFR Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/gfr

Results provided by this tool are for reference only and do not constitute professional advice.