Kidney Risk Factor Count
Kidney function is measured with a blood test (eGFR) and a urine test, and chronic kidney disease often has no symptoms early on. This page does not estimate a "kidney age". It counts risk factors the NHS names, such as high blood pressure and diabetes.
Before you start
Method : Kidney Risk Factor Count — a custom points score written by this site. Each answer adds or subtracts the points shown in the Methodology table below.
Validation : Unvalidated. The points have never been tested against any laboratory measurement or health outcome, and the result is not an age.
Review : not reviewed by a qualified clinician. Educational only — not a diagnosis or a medical test.
Passing much less urine than usual, blood in your urine, or swelling of the ankles with breathlessness should be checked by a doctor promptly.
Your answers stay in this browser tab; nothing is sent or stored.
Answer the questions, then press Calculate score.
How to Use This Calculator
- Answer each question.
- Press Calculate score.
- Read the breakdown and suggestions.
Methodology & assumptions
Your score is the sum of the points below. The weights are our own judgement. The old version added made-up years for water, sodium and protein intake, symptoms and eGFR categories and gave a "kidney age". Test results and symptoms need a doctor, so they were removed with the age output.
| Factor | Answer | Points |
|---|---|---|
| High blood pressure | No | 0 |
| Yes, controlled | +1 | |
| Yes, not controlled | +2 | |
| Not checked in 5 years | +1 | |
| Diabetes | No | 0 |
| Yes | +2 | |
| Close relative with kidney disease | No / don't know | 0 |
| Yes | +1 | |
| Body mass index (BMI, kg/m²) | Under 30 | 0 |
| 30 or more | +1 | |
| Smoking | Never | 0 |
| Former | 0 | |
| Current | +1 | |
| Regular use of anti-inflammatory painkillers (e.g. ibuprofen) | No | 0 |
| Most days | +1 |
Worked examples
Uncontrolled high blood pressure, diabetes, family history, BMI 31, smokes, painkillers most days: 2 + 2 + 1 + 1 + 1 + 1 = +8 points.
Normal blood pressure, no diabetes, no family history, BMI 24, never smoked, no regular painkillers: 0 points.
Understanding your result
This counts risk factors you reported. It is not a kidney function test and not an age. Health-agency guidance linked below is general and based on populations, not on this score.
Sources & further reading
The points table is our own convention and is not taken from these sources.
Frequently Asked Questions
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