Estimate your COVID-19 infection fatality rate, hospitalization risk, ICU risk, and long COVID probability based on age, vaccination, comorbidities, and BMI.
The COVID-19 Mortality Risk Assessment Calculator provides a personalized estimate of your infection fatality rate (IFR), hospitalization risk, ICU admission probability, and long COVID risk based on your individual risk factors. While population-level statistics are widely published, individual risk varies enormously based on age, vaccination status, comorbidities, BMI, and smoking history.
Age is the single strongest predictor of COVID-19 severity. The infection fatality rate increases approximately 10-fold for every 15-year increase in age, from 0.003% in those under 20 to over 15% in those over 80 (unvaccinated). Vaccination (especially boosted) reduces mortality by 90–95% across all age groups. Comorbidities like cardiovascular disease, diabetes, chronic kidney disease, and immunosuppression multiply the baseline risk by 1.5–2.8×.
This calculator synthesizes data from large meta-analyses of COVID-19 outcomes, including the O'Driscoll et al. IFR estimates, CDC comorbidity hazard ratios, and vaccine effectiveness studies. The output provides both absolute risk (e.g., "1 in 5,000") and comparative context with age-stratified reference tables and comorbidity multiplier breakdowns.
Understanding your personal risk level helps you make informed decisions about precautions, vaccination timing, treatment eligibility (Paxlovid/monoclonal antibodies), and when to seek medical care. A 30-year-old boosted healthy individual and an 80-year-old unvaccinated diabetic have vastly different risk profiles — this calculator quantifies that difference. Keep these notes focused on your operational context.
Adjusted IFR = Base_IFR × Sex_Factor × (1 − Vacc_Reduction) × Comorbidity_Multiplier × BMI_Factor × Smoking_Factor Base IFR by age: <20: 0.003%, 20s: 0.01%, 30s: 0.03%, 40s: 0.1%, 50s: 0.4%, 60s: 1.4%, 70s: 4.6%, 80s: 15%, 90+: 25% Vaccination Reduction: Boosted 95%, Full 85%, Partial 60%, Unvaccinated 0% Hospitalization ≈ IFR × 12, ICU ≈ IFR × 5
Result: Mortality Risk: 1 in 5,291 — Moderate risk
Base IFR for ages 60–69: 1.4%. Male adjusted: 1.82%. Boosted: 1.82% × 0.05 = 0.091%. With diabetes (1.8× multiplier): 0.164%. With BMI 32 (1.5× obesity): 0.245%. Hospitalizations: ~2.9%, ICU: ~1.2%. Vaccination reduced the base risk by 95%.
Age is the dominant risk factor for COVID-19 severity because of immunosenescence — the gradual deterioration of the immune system with age. Older adults have fewer naïve T cells, reduced antibody responses, and increased baseline inflammation (inflammaging). This explains the 1,000-fold difference in IFR between children and those over 80.
COVID-19 vaccines dramatically reduce severe outcomes even as variants evolve. While protection against infection wanes over months, protection against hospitalization and death remains robust (85–95% with boosters) because T-cell immunity is more durable than antibody levels. Hybrid immunity (vaccination plus prior infection) provides the broadest protection.
Compare your COVID-19 mortality risk with other everyday risks: annual driving fatality risk is ~1 in 8,000; flu IFR is ~0.1% for those over 65. For a healthy, boosted 40-year-old, COVID-19 IFR is comparable to annual driving risk. For an 80-year-old unvaccinated individual with diabetes, the risk is orders of magnitude higher, justifying aggressive prevention and early treatment.
IFR is the proportion of all infected people (including asymptomatic cases) who die from the infection. It differs from case fatality rate (CFR), which only counts confirmed cases. IFR is typically much lower than CFR because many infections are never diagnosed.
This calculator provides population-level risk estimates based on published meta-analyses. Individual outcomes depend on many additional factors including viral variant, viral load, timing of treatment, hospital capacity, and specific immune status. Use the results as a general guide, not a precise prediction.
The base IFR values are approximate and represent general risk. Specific variants may have different severity profiles. Omicron variants appear to have lower intrinsic severity than Delta, but the calculator's relative risk factors (age, vaccination, comorbidities) remain valid across variants.
Long COVID (Post-Acute Sequelae of SARS-CoV-2, or PASC) refers to symptoms persisting more than 12 weeks after initial infection. Common symptoms include fatigue, brain fog, shortness of breath, and exercise intolerance. Estimates suggest 5–15% of infections result in long COVID, with vaccination reducing risk by approximately 50%.
Paxlovid (nirmatrelvir/ritonavir) is recommended for patients at high risk of severe COVID-19, generally those with risk factors that would give a moderate or higher risk on this calculator. Consult your healthcare provider — Paxlovid has important drug interactions and must be started within 5 days of symptom onset.
In this model, comorbidity risks are multiplicative. A patient with both diabetes (1.8×) and CKD (2.5×) has a combined multiplier of 4.5×. In reality, the interaction may be somewhat less than purely multiplicative, but having multiple conditions does substantially compound risk.