Estimate relative COVID-19 mortality risk from age, BMI, vaccination, smoking, and major health conditions.
COVID-19 risk profile
Enter current demographic and health information. This educational estimate is not a diagnosis or a prediction of an individual outcome.
About COVID-19 mortality risk
A COVID-19 mortality risk calculator combines characteristics associated with severe outcomes into an understandable estimate. Age is usually the strongest predictor: population studies consistently show a steep increase in mortality with advancing age. Biological sex, obesity, smoking, vaccination, immune status, and chronic disease can also change risk. This calculator uses those factors in a transparent educational model so that users can see how several risks may compound rather than considering age alone.
The estimate begins with a small baseline and doubles for each decade of age relative to age 30. It then applies multipliers for male sex, elevated BMI, smoking, diabetes, cardiovascular disease, chronic lung disease, active cancer, chronic kidney disease, and immunocompromise. Vaccination applies a protective multiplier. These relationships reflect broad directions found in epidemiological research, but the precise coefficients are not a currently calibrated clinical model. Variant, prior infection, booster timing, treatment access, frailty, pregnancy, medications, and local health-system conditions are not represented.
A percentage produced here must therefore be read as a relative educational estimate, not a personal prognosis. Population averages cannot determine what will happen to one person. A low result does not mean infection is harmless or that precautions are unnecessary. A high result does not mean death is expected. Clinical decisions require current guidance and an assessment by a qualified professional who can review diagnoses, medicines, immune function, symptoms, and laboratory data.
Accurate inputs matter. Use current age and BMI, and mark a condition only when it has been diagnosed. Vaccination status should describe completion of the recommended primary series for the user, while recognizing that protection changes with time and updated doses. Smoking refers to combustible tobacco exposure. If an answer is uncertain, discuss the underlying health history with a clinician instead of treating the calculator as a screening test.
This tool is most useful for illustrating why layers of protection matter. Vaccination, prompt testing when symptomatic, access to indicated antiviral treatment, ventilation, and appropriate masking can reduce harm. Anyone with trouble breathing, persistent chest pain, confusion, blue or pale lips, or another emergency warning sign should seek urgent medical help rather than relying on an online calculation.
COVID-19 risk examples
Profile
Illustrative result
Interpretation
Age 40, BMI 24, female, fully vaccinated
0.01%, low
The model floor applies to this lower-risk profile.
Age 55, BMI 28, male, fully vaccinated, former smoker
About 0.15%, moderate
Age, sex, BMI, and smoking history raise the estimate.
Age 70, BMI 32, male, unvaccinated, three conditions, current smoker
About 2.97%, high
Multiple independent factors compound in the model.
How to use the calculator
Enter current age and BMI within the displayed ranges.
Choose sex, vaccination status, and smoking history.
Mark each diagnosed health condition accurately.
Select Calculate risk and interpret the estimate with the caution shown.
Frequently asked questions
Does this calculator predict whether I will die from COVID-19?
No. It applies broad population risk relationships to the entered factors and cannot predict an individual outcome. Current variants, treatments, prior infection, and many personal details are not included.
Why does age affect the result so much?
Observed severe-disease and mortality rates rise sharply with age. Age also overlaps with frailty and chronic illness, so a clinician may interpret it differently in an individual assessment.
How is vaccination represented?
The model applies a protective multiplier for partial or full vaccination. Real protection depends on dose timing, updated boosters, variant, immune response, and previous infection.
Can I use the result to decide about treatment?
No. Eligibility for antiviral or other treatment depends on current medical guidance, symptoms, timing, diagnoses, and medication interactions. Contact a healthcare professional promptly after a positive test if you may be at higher risk.
What should I do with a high result?
Use it as a reason to discuss prevention and a response plan with a qualified clinician. Seek urgent care for emergency warning signs regardless of the calculated category.