Kidney Health Report — PatientThread · Dr C. Lawrence, Consultant Nephrologist
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Your Details
Enter your measurements to calculate your eGFR using CKD-EPI 2021 (race-free) · For adults aged 18 and over only
cm
ft & in
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in
kg
st & lbs
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μmol/L
UK standard: μmol/L
switch to mg/dL
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Your eGFR Result
CKD-EPI 2021 (race-free equation)
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mL/min/1.73m² eGFR
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BMI: — kg/m²
Cockcroft–Gault Creatinine Clearance (adjusted body weight)
Your BMI is outside the 20–25 normal range. The CKD-EPI equation may be less accurate. Cockcroft–Gault using adjusted body weight may give a more representative estimate.
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mL/min (Cockcroft–Gault)
CKD Stage Reference
| Stage | eGFR (mL/min/1.73m²) | Description |
|---|---|---|
| G1 | ≥ 90 | Normal or high |
| G2 | 60–89 | Mildly decreased |
| G3a | 45–59 | Mildly-moderately decreased |
| G3b | 30–44 | Moderately-severely decreased |
| G4 | 15–29 | Severely decreased |
| G5 | < 15 | Kidney failure |
Guidance
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Do you have previous results to add?
Tracking your trend helps understand what is really happening over time
Important note about single readings: The eGFR is not validated where kidney function may be rapidly changing, and one-off 'sinker' results are well recognised — a single low reading may not reflect your true baseline. A confirmatory test is recommended before any diagnosis is made.
Enter Previous Blood Test Results
μmol/L
† Previous results are entered as creatinine (not eGFR) because different laboratories may use different equations to calculate eGFR — entering the raw creatinine value ensures consistency. The eGFR values shown in the chart are all calculated using the CKD-EPI 2021 equation and may therefore differ slightly from the eGFR values you were given at the time.
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Urine Albumin:Creatinine Ratio (ACR)
Detects protein in the urine — a key marker of kidney damage
Recommended next step: Ask your GP or practice nurse for a urine ACR test. This is a simple urine sample (ideally your first morning sample) that checks for protein — a key marker of kidney damage not captured by eGFR alone. It is essential for accurately staging CKD and estimating progression risk.
mg/mmol
UK standard: mg/mmol
switch to mg/g
CKD Risk Category (KDIGO / NICE NG203)
This chart combines your eGFR stage and albuminuria category to give your overall CKD risk, following KDIGO 2024 / NICE NG203 guidelines. Your position is highlighted with a border. Green = low risk, red = very high risk.
Low
Moderately increased
High
Very high
Very high — discuss with your GP or a specialist
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Blood Pressure
BP control is one of the most important factors in slowing CKD
How to check your blood pressure: You can get it checked at your GP surgery, a pharmacy (many offer free checks), or using a home blood pressure monitor (~£25–£40 from pharmacies and online). Friends or family with a monitor may also be able to help. Regular home monitoring is often more accurate than a single clinic reading.
mmHg
mmHg
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Save, Print or Share Your Results
Your data is stored locally on this device — nothing is sent anywhere
Your results are automatically saved on this device using your browser's local storage. They will still be here if you close and reopen this page on the same device. Use the print button to generate a one-page PDF summary to share with your GP or specialist.
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Further Support & Resources
From Dr Christopher Lawrence, Consultant Nephrologist
About these recommendations: This tool references NICE CKD Guidelines (NG203) and uses the internationally validated CKD-EPI 2021, Cockcroft–Gault, and KFRE equations. Guidelines are a framework — not a rigid rulebook. Every patient's situation is individual. Use this as a starting point for a conversation with your GP, and ask about a referral to a nephrologist if you have concerns. Do not act on these results alone.
Useful Links
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hertskidneycare.co.ukDr Lawrence's kidney care practice
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Book a consultationDoctify — Dr Christopher Lawrence
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Don't Panic! — the bookA kidney doctor's straight-talking guide to CKD
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Dr Lawrence's Amazon StoreBP monitors, scales, urine test strips, bottles & more
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NICE CKD Guidelines NG203Full published clinical guidance
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KFRE CalculatorOfficial Tangri Lab kidney failure risk tool
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Kidney Patients AssociationUK charity supporting kidney patients
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UK Kidney Association (UKKA)Professional body for kidney medicine in the UK