🫘 GFR Calculator

Estimate kidney function from your blood test results.

Stone

Pounds

Weight (kg)

Sex

Age (years)

Creatinine result

Unit on your lab report

Use alongside advice from your GP, not on its own.

About this tool

Estimate kidney function from your weight, age and creatinine blood test result.

For guidance only. Results are estimates. Please speak to your GP or midwife for advice about your health.

Useful next steps if you want more context from your results.

Free, friendly health and fitness tools for the UK.

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