Life Expectancy Calculator.
Free longevity calculator and lifespan test. Answer 5 questions about your lifestyle, health, and date of birth to get your personalised estimate. Based on WHO 2023 data.
How it works
How this longevity calculator and lifespan test works.
This free life expectancy calculator, also known as a longevity calculator, estimates how long you will live based on your personal health profile. The calculation starts with the WHO 2023 baseline life expectancy for your country of residence, covering 190+ nations. From there, it applies evidence-based adjustments for your individual lifestyle and health factors, each informed by published research on that factor.
The tool scores 10+ factors: smoking (up to −8 years for heavy smokers), exercise frequency (+4 years for those active 5 or more times per week), sleep quality (+1 to +3 years for optimal sleepers), diet, alcohol use, chronic conditions like diabetes or heart disease (−6 to −10 years), family longevity, education, income, stress, and mental health. The result is a personalised estimate of how long you will live given your current profile, not just a population average.
The calculator is designed as a reflection tool, not a medical forecast. Population-level statistics describe median outcomes across large groups and your individual result will vary. All calculations run locally in your browser. No data is stored or shared, and no sign-up is required. Retake it after any lifestyle changes to see the estimated difference.
Up to +7 years
the life expectancy difference between the best and worst lifestyle profiles for the same age and country, based on the factors scored below.
Factors scored in this calculator
Demographics
Tell us about yourself.
FAQ
Frequently asked questions.
How long will I live?
The average person in the United States lives to around 79 years. Your personal estimate depends on your age, sex, country, lifestyle, and health history. This calculator adjusts for over 10 factors including smoking, exercise, sleep, diet, and chronic conditions to give you a personalised estimate in under 2 minutes.
How does this life expectancy calculator work?
The calculator starts with the WHO 2023 life expectancy baseline for your country, then applies evidence-based adjustments for your lifestyle and health profile. Factors scored include smoking, alcohol, exercise, diet, chronic conditions, family longevity, education, income, stress, sleep, and mental health — each informed by published research on that factor.
What is a longevity calculator?
A longevity calculator estimates how long you are likely to live based on your personal health profile. It starts with a country-level baseline from WHO or actuarial data, then adjusts for modifiable lifestyle factors. This longevity calculator uses WHO 2023 baselines for 190+ countries and adjustments informed by published research on each factor.
Is this life expectancy calculator free?
Yes. This is a completely free life expectancy calculator with no sign-up, no email required, and no paywall. All calculations run in your browser and your answers are never stored or shared.
How accurate is the calculator?
It produces a population-level statistical estimate, not a medical prediction. It reflects median outcomes for people with similar profiles. Individual outcomes vary based on genetics, undisclosed conditions, and future lifestyle changes. Use it as a reflection tool, not a medical forecast.
What factors affect life expectancy the most?
Smoking (up to 8 fewer years), chronic conditions like heart disease (7 fewer years) or cancer (10 fewer years), physical inactivity (3 fewer years), and poor sleep are the biggest negative factors. Regular exercise adds up to 4 years and optimal sleep adds 1 to 3 years.
What is the average life expectancy in the US?
The average life expectancy in the United States is 79.1 years (WHO 2023): 76.4 years for males and 81.5 years for females. The US ranks 34th globally, below most other high-income nations.
Can I improve my life expectancy?
Yes. Quitting smoking, exercising 3 to 5 times per week, optimising sleep to 7 to 9 hours, and managing chronic stress are the highest-impact changes. Retake the calculator after lifestyle changes to see the estimated difference.
Is my data private?
Yes. All calculations happen locally in your browser. We never store, log, or transmit your answers. No account is required.
How is this different from a life insurance calculator?
A life insurance calculator estimates your premium based on risk categories. This life expectancy calculator estimates how long you will actually live based on your health profile and WHO actuarial data. One prices risk; the other estimates lifespan.
Is this a lifespan calculator by date of birth?
Yes. Enter your current age (derived from your date of birth) along with your country, sex, and lifestyle factors and the calculator estimates your total lifespan and remaining years. It works as a lifespan calculator by date of birth — the older you are, the more the conditional life expectancy baseline shifts in your favour.
What is a life expectancy test?
A life expectancy test is a structured questionnaire that estimates how long you will live based on your personal health and lifestyle profile. This test scores 10+ factors including smoking, exercise, sleep, diet, chronic conditions, and family history, then applies them against WHO 2023 baseline data for your country.