About Medical Calculators

Our free medical calculators help you estimate kidney function (eGFR, creatinine clearance) and heart rate zones. These tools are useful for tracking health metrics and understanding your numbers better.

Note: Results are estimates for informational purposes only and are not medical advice. Always consult a qualified healthcare professional for diagnosis or treatment.

About These Medical Estimators

These three calculators decode numbers that show up on medical reports and training plans: eGFR (CKD-EPI 2021) estimates kidney filtering and stages chronic kidney disease; creatinine clearance (Cockcroft-Gault, 1976) estimates the same for drug-dosing contexts; and heart rate zones (Tanaka equation) map your training effort into five levels from recovery to peak. They’re built on the same equations clinicians use — but they are information tools, not medical advice. Kidney numbers must be interpreted by your doctor with your full history, and any heart symptoms with exertion deserve medical clearance before zone training.

FAQ

eGFR vs creatinine clearance — which do I need?

For understanding kidney health and CKD staging: eGFR. For medication dose questions: creatinine clearance is what dosing guidelines usually quote. Ask your pharmacist which they want.

Can I use these to adjust my medicine?

No. Never self-adjust doses. These tools help you understand reports and have better conversations with your doctor.

Are heart rate zones safe for everyone?

Healthy people can use them freely. With heart conditions, hypertension, or chest pain on exertion, get your doctor’s go-ahead first — and note that beta-blockers change heart-rate behaviour.

Explore more health calculators, or try our popular eGFR Calculator and Creatinine Clearance Calculator.