Free 10-Year Heart & Stroke Risk Calculator with Blood Test Interpretation (UK)

Estimate your cardiovascular risk and understand your blood test results — completely free.
This tool calculates your 10-year probability of heart attack or stroke using the UK-validated QRISK3 model and provides an interpretation of key laboratory parameters such as total cholesterol, HDL, and blood pressure. It is adapted for UK adults and reflects British clinical reference standards.


What the calculator does

• Estimates 10-year cardiovascular risk (CVD): Evaluates your likelihood of developing a major cardiac or cerebrovascular event within the next decade.
• Explains key contributing factors: Details how your age, sex, blood pressure, cholesterol ratio, BMI, smoking status, and medical history affect your result.
• Interprets blood test results: Relates your cholesterol and lipid values to your cardiovascular profile rather than presenting isolated figures.
• Provides an easy-to-read report: Summarises whether your risk is Low, Moderate, High, or Very High with clear guidance on next steps.

Based on UK population data

The calculator uses the QRISK3 algorithm, a model developed from extensive UK population research. It incorporates clinical and demographic data representative of the British population, including age, sex, ethnicity, blood pressure, cholesterol, smoking, and chronic conditions. The methodology aligns with current guidance from the National Institute for Health and Care Excellence (NICE).


Information you’ll need

To receive an accurate result, enter:

• Age, sex, and ethnicity
• Systolic blood pressure (mmHg)
• Total cholesterol and HDL cholesterol (mmol/L)
• Height and weight (to calculate BMI)
• Smoking status (never, former, or current smoker)
• Any known conditions: diabetes, kidney disease, atrial fibrillation, rheumatoid arthritis, or family history of early heart disease.

How your result is calculated

1. The calculator analyses your individual data.
2. It applies the QRISK3 formula to estimate the percentage likelihood of a cardiovascular event within ten years.
3. The outcome is then categorised into four risk levels — from Low to Very High — along with explanations of the main contributing factors.
4. You receive a structured summary that can be downloaded or printed for discussion with your GP.

Understanding your results

• Low risk: Maintain a balanced lifestyle, healthy diet, regular physical activity, and non-smoking habits.
• Moderate risk: Review your lifestyle choices and consider medical consultation to prevent progression.
• High or very high risk: Schedule an appointment with your doctor to discuss further investigations or treatment options.

A “normal” lab result alone doesn’t always mean “low risk.” The calculator integrates multiple parameters to reveal the broader cardiovascular picture, identifying risk patterns that may not appear in single test values.


Who it’s for
This free tool is designed for:

• Individuals seeking to better understand their lab results and long-term heart health.
• Medical professionals and clinics that wish to provide patients with accessible, evidence-based risk information.

Responsible use

This calculator is for educational and preventive purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your results and next steps with a qualified healthcare professional.