Life Expectancy Calculator
Start with your age and sex. Add how you live and the estimate becomes yours. It is free, with no email and no signup.
Enter your age and sex to see the average for someone like you.
Make it yours. Each of these is optional.
The large number starts as an average. Each answer you add moves it toward your own. The full assessment is your age, then a dozen questions, about 2 minutes, and everything it gives you is free.
Average life expectancy by age
A person who has already reached 60 can expect to live longer than a newborn can, because they have outlived the risks of every earlier year. That is why life expectancy increases with age. So the average depends on how old you are now. The table gives it for the United States, with the range between the worst and the best habits at each age.
| Age now | Women | Men | ||
|---|---|---|---|---|
| Average | Range | Average | Range | |
| 20 | 84.9 | 75.5 to 89.3 | 80.0 | 71.8 to 84.1 |
| 30 | 84.8 | 75.4 to 89.2 | 80.3 | 72.1 to 84.1 |
| 40 | 84.8 | 75.4 to 89.2 | 80.8 | 72.6 to 84.6 |
| 50 | 85.2 | 75.8 to 89.6 | 81.7 | 73.5 to 85.5 |
| 60 | 86.0 | 78.2 to 89.6 | 83.1 | 76.3 to 86.2 |
| 65 | 86.7 | 79.7 to 89.8 | 84.2 | 78.1 to 86.9 |
| 70 | 87.7 | 81.5 to 90.3 | 85.6 | 80.2 to 87.9 |
| 80 | 90.3 | 86.3 to 91.9 | 89.0 | 85.5 to 90.4 |
| 90 | 95.1 | 91.8 to 96.3 | 94.4 | 91.6 to 95.4 |
Counting from a retirement age instead? The life expectancy after retirement calculator gives the average years ahead for a person who reaches the age you choose, with the same range.
How long will I live?
It depends on your age, your sex and how you live. For a 40-year-old woman with average habits the engine's estimate is about 84.8. With every habit at its worst it is 75.4, and with every habit at its best it is 89.2. For a 40-year-old man the three numbers are 80.8, 72.6 and 84.6. After 50 the gap between worst and best narrows with every decade, because there are fewer years left for habits to act on.
What is the most accurate life expectancy calculator?
We know of no public ranking. A calculator can only be scored against recorded deaths in a large group that researchers have followed for years. Some research tools have been tested that way. Ours has not yet been. What you can check today is how one is built, and this is how ours is built.
- A current baseline. The estimate starts from the CDC's 2024 life table, read for your age in years and your sex, with every age from 18 to 100 in the table. The engine adds an allowance for mortality continuing to improve, so its averages run above the CDC's published figures.
- Studies you can look up. Each of the ten habit and weight factors is anchored to a named study, and their combined size is calibrated to a study that measured the habits together. The full list is on the methodology page.
- No double counting. Good habits overlap, so their gains are discounted and do not simply add up.
- A dated record. Every release since July 2026 is dated in the model changelog, with our own mistakes listed as mistakes. The live model is engine
2.2.3. - A review every month. We read the new research each month and log each review in the changelog.
- Known limits. It does not test your genes or read your medical history. One question about your grandparents is its only family signal. Its baseline is United States data. It is an estimate, not a prediction.
Our goal is to be the most accurate life expectancy calculator you can use without bloodwork. For the longer answer, read how accurate life expectancy calculators are.
What the calculator does
Some online life expectancy calculators ask dozens of questions and hand you a number with no context. Others ask a handful and hand you your country's average. Longlevity is built for the gap in the middle.
The assessment covers 11 factors. Five have the strongest evidence, measured in years of life. They are smoking, exercise, diet, alcohol, and body weight. Five more have large, replicated links to mortality and carry smaller adjustments. They are sleep, stress, relationships, purpose, and preventive care. The eleventh is your family history. Each of the ten is anchored to a specific published study, and the full study list and effect sizes are on the methodology page.
We combine your answers with U.S. CDC life tables to produce an estimate, then show you how it compares against the average. The assessment and your estimated lifespan are free, always. No account. No credit card required.
People covered by the research behind your estimate
Aggregated across the landmark cohort studies and CDC life tables. They include GBD Alcohol 2018 (592 studies, 28M), Global BMI Mortality Collaboration 2016 (10.6M), Zhao/Naimi 2023 (alcohol, 4.8M), Bhaskaran 2018 (body weight, 3.6M), Yin 2017 (sleep, 3.5M), Holt-Lunstad 2015 (social, 3.4M), Wang 2023 (social, 2.2M), Cho/Jha 2024 (smoking, 1.48M), Prospective Studies Collaboration 2009 (900K), Million Veteran Program 2024 (719K), Moore 2012 (activity, 654,827), and more. Full list on the methodology page.
What you get from taking it
Here's what shows up when you finish.
Your estimated lifespan. It is a specific number based on your demographics plus your assessment answers. You'll see how your estimate compares against the average for your age and sex, plus a timeline of the road ahead. Your biological age, which estimates how old your habits make you compared with your calendar age, and your potential are in the Longlevity Report.
Your longevity archetype, in the Report. The Report names which of seven patterns you fit. They are the Burnout Runner (great discipline, bad recovery), the Coaster (strong emotional foundation, coasting physically), the Optimizer (already ahead, fine-tuning), the Stress Carrier (one dominant drag), the Late Starter (lots of room to grow), the Blind Spot (strong profile with one hidden weakness), and the Builder (an above-average base with two or three clear gaps to close). The pattern is the kind of thing you might describe to a friend. The archetype, your biological age and the full ranked analysis are in your Longlevity Report, free for everyone.
A place to start this week. The 160+ habit library of science-backed actions, free to read. Your biggest lever by name and the full ranking, with the years each habit is worth to you, are in your report, free.
How the math works
Longlevity combines three things. The first is a U.S. CDC actuarial baseline for someone your age and sex. The second is a set of habit-specific adjustments drawn from mortality studies. The third is an interaction discount on the gains from good habits. The full breakdown (every study used, the exact shape of each adjustment, and the limits of what Longlevity can tell you) is on the methodology page.
Who this is for
Longlevity is built for adults 18 and over who want three things.
- A realistic estimate of their trajectory
- An honest read on which habits matter most for them specifically
- Actionable, science-backed guidance
The estimate is free. The habit read and the guidance come with the Longlevity Report.
Whatever your age, treat the number as a direction to move in, not a verdict.
Who this isn't for
If you have a specific medical condition, are currently under care for a chronic illness, or want advice calibrated to your personal medical history, Longlevity is not a substitute for a doctor. It's educational. Use it to inform conversations with a healthcare provider, not to replace them.
Based on U.S. population data. Outside the U.S. it still works. Your estimate will be off by roughly the difference between your country's life expectancy and the U.S. figure, and by less at older ages.
For the full list of limitations, including what we don't integrate with and what we can't predict, see what Longlevity cannot tell you.
What happens after you see your number
Once you have your estimate, you can do four things.
- See where you stand. The free result shows your estimated lifespan and how it compares against the average. (Your biggest lever by name, how many years it is worth, and the full color-coded breakdown of every habit are in your report, free.)
- Browse the habit library. 160+ science-backed actions, free to read, with the research behind every health claim.
- Re-measure over time. Save your results to a free account and re-measure whenever you like, free. Each check-in is saved, and once two are a month apart your history lists the estimated lifespan from each. It works across devices.
- Compare with a loved one. See how much time you have left together, in years and "hangouts".
Frequently asked questions
Is this life expectancy calculator free?
Yes. The calculator, the assessment, your estimated lifespan and your full report are free. No email, no account and no credit card. If you want a link to come back to, you can email yourself your results, but you never have to.
Is this an AI life expectancy calculator?
No. The ".ai" is just our web address. Your estimate is never generated by AI. It is computed by a published model, the CDC's life table plus ten factors each anchored to a named study, and the same answers give the same number on the same engine version. We use AI behind the scenes to help review research and test the math. It never sees your answers.
How long does the assessment take?
About 2 minutes. Your age, then a dozen questions about your sex, your height and weight, your habits and your family history. You'll see your estimate immediately when you finish.
Can I take the assessment more than once?
Yes, and we recommend it. A longevity assessment a year from now is genuinely different from one today (your habits change, your answers shift, your baseline updates). Think of it as an annual longevity physical. Save your results and we'll invite you back a year later to re-measure, free. You can also re-measure any time in between. Unsubscribe any time.
What makes this different from other life expectancy calculators?
It shows its work, and it goes past the number. The sources and the method are on our methodology page. The Longlevity Report names your single biggest lever, sizes it in years and turns the whole profile into an actionable pattern (your archetype plus every habit ranked).
Can't I get the same answer from an AI chatbot?
You can get a number. You cannot get a model. A chat answer comes with no published model, no calibration and no record of how it was produced, so nothing ties next month's answer to this one. Longlevity's number comes from a versioned engine with the CDC's own life table underneath it, ten factors each anchored to a named study, a discount for habits that overlap, and a public changelog of every review and release. Your saved result records the version that produced it, and your history is re-scored whenever the engine improves. The assessment is free, so the comparison costs you two minutes.
Is this a life expectancy test or a quiz?
It is a short test. The calculator at the top of this page takes your age and sex and, if you like, three more answers. The full assessment is your age and a dozen questions, about 2 minutes, and it ends on your estimated lifespan, free.
Does it use the CDC's life tables?
Yes. The baseline is the CDC's United States life table for 2024, read for your age and sex. The engine adds an allowance for mortality continuing to improve, so its averages run above the CDC's published figures, by a little over two years at 30 and about two tenths of a year by 90. Then it adjusts for your habits. The detail is on the methodology page.
Does weight or BMI change life expectancy?
Yes. The assessment asks your height and weight and uses your BMI as one of the factors it weighs. The research behind it is in does being overweight shorten your life.
Does it use my medical history?
No. It asks about your habits, your height and weight, and how long your family has lived. It does not ask for diagnoses, bloodwork or blood pressure readings, so it cannot account for a specific condition. For that, talk to a doctor.
Which free life expectancy calculator is the most accurate?
We know of no public ranking. A calculator can only be scored against recorded deaths in a large group followed for years. Some research tools have been tested that way. Ours has not yet been. What you can check is how one is built. Look for a current official life table for your age and sex, a named study behind every habit, a published method, and a dated record of changes. Ours are on the methodology page and in the model changelog.
How accurate is a life expectancy calculator?
No calculator can tell you the year you'll die, and any that claims to is overselling. The real value isn't the decimal place. It's the relative read. The estimate shows how you compare against the average, and the Longlevity Report shows which habits are helping, which are costing you years, and how much is still on the table. Treat the number as a direction to move in, not a verdict, and re-measure over time to watch it change.
For questions about support payments, data handling, account access, and refunds, see the full FAQ.