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One or more reached 90
Estimated Life Expectancy
Understanding Life Longevity Calculations
Life expectancy is a statistical measure of the average time an organism is expected to live, based on the year of its birth, its current age, and other demographic factors including lifestyle habits. While genetics play a significant role, modern science suggests that up to 70% of aging is influenced by lifestyle choices.
Key Factors in the Longevity Equation
Biological Sex: Historically, women tend to outlive men by 4 to 7 years due to biological and social factors.
Smoking: This remains one of the most significant preventable causes of death, potentially reducing life expectancy by 10 years or more.
Physical Activity: Regular cardiovascular exercise strengthens the heart and reduces the risk of metabolic diseases.
Nutrition: A diet high in antioxidants, fiber, and healthy fats (like the Mediterranean diet) is strongly correlated with cellular health.
Mental Well-being: Chronic stress produces cortisol, which over time can lead to inflammation and heart issues.
Longevity Estimation Example
Consider a 35-year-old female who does not smoke, exercises 5 hours a week, and has a family history of longevity:
Base Longevity (Female): 82 Years
Exercise Bonus: +4 Years
Non-Smoker Bonus: +3 Years (relative to average)
Genetic Bonus: +3 Years
Estimated Total: 92 Years
How to Improve Your Score
The beauty of longevity science is that it is never too late to start. Quitting smoking at age 40 can recover nearly 9 years of life expectancy. Similarly, transitioning from a sedentary lifestyle to moderate activity (150 minutes per week) can add significant years and, more importantly, "healthspan"—the portion of life spent in good health.
function calculateLongevity() {
var currentAge = parseFloat(document.getElementById('currentAge').value);
var gender = document.getElementById('gender').value;
var smoking = document.getElementById('smoking').value;
var exercise = parseFloat(document.getElementById('exerciseHours').value) || 0;
var diet = parseFloat(document.getElementById('dietScore').value) || 5;
var alcohol = parseFloat(document.getElementById('alcohol').value) || 0;
var stress = parseFloat(document.getElementById('stress').value) || 5;
var genetics = document.getElementById('genetics').value;
if (isNaN(currentAge) || currentAge 60) {
baseExpectancy += (currentAge – 60) * 0.2;
}
var adjustments = 0;
// Smoking logic
if (smoking === 'current') {
adjustments -= 10;
} else if (smoking === 'former') {
adjustments -= 3;
} else {
adjustments += 2;
}
// Exercise logic
if (exercise >= 5) {
adjustments += 5;
} else if (exercise >= 2) {
adjustments += 3;
} else if (exercise = 8) {
adjustments += 4;
} else if (diet 14) {
adjustments -= 3;
} else if (alcohol > 0 && alcohol = 8) {
adjustments -= 4;
} else if (stress <= 3) {
adjustments += 2;
}
// Genetics logic
if (genetics === 'yes') {
adjustments += 5;
}
var finalResult = baseExpectancy + adjustments;
// Cannot die in the past logic
if (finalResult < currentAge) {
finalResult = currentAge + 2;
}
var remaining = finalResult – currentAge;
document.getElementById('finalAge').innerText = Math.round(finalResult) + " Years";
document.getElementById('yearsRemaining').innerText = "That's approximately " + Math.round(remaining) + " years from now.";
document.getElementById('longevityResult').style.display = 'block';
document.getElementById('longevityResult').scrollIntoView({ behavior: 'smooth' });
}