Life Expectancy Calculator

Look up the official 2023 U.S. period life-table average for remaining years of life from completed age and sex.

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Official U.S. table lookup

This narrowed version uses the 2023 official U.S. period life tables only. It looks up the average remaining years for a completed age and sex, without trying to personalize the result from lifestyle or medical factors.

Current age (completed years)

Sex in the source table

What this page does not do

It does not add or subtract years for smoking, BMI, alcohol, exercise, chronic conditions, sleep, income, or family history. Those inputs are intentionally excluded in this safer V1.

Result

42.7 years

Average remaining life expectancy for a female age 40 in the official 2023 U.S. period life table.

Expected age: 82.7
Survivors at this age: 97,333
Other-sex comparison: 38.6 years
Gap at this age: -4.1 years

How to read this

For women age 40, the official 2023 U.S. period life table shows about 42.7 remaining years, reaching an average age of roughly 82.7 if 2023 mortality patterns stayed unchanged.

Conditional survival to later ages

Milestone age	Survivors in table	Chance from current age
75	75,228	77.3%
80	64,735	66.5%
85	49,655	51%
90	30,673	31.5%

Important limits

This uses an official U.S. period life table, which is a population snapshot rather than a personal forecast.
It does not adjust for smoking, BMI, illness, income, family history, or other individual circumstances.
Conditional survival percentages show how many people at the same current age would be expected to reach later milestone ages under the same mortality pattern.

Population average only This calculator shows official U.S. statistical averages only. It is not a personal medical prediction, prognosis, or substitute for professional advice.

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Health — Ageing

Life expectancy calculator guide: using official U.S. period life tables without pretending to predict one person’s lifespan

A life expectancy calculator is safest when it starts from an official life table and stays honest about what that means. This version uses the 2023 U.S. period life tables to show population-average remaining years by completed age and sex, then adds milestone survival context without claiming to predict any one person’s true lifespan.

About this calculator

Reviewed 20 March 2026

Methodology

The calculator looks up completed age and sex in the official 2023 U.S. CDC/NVSS period life tables, returns the remaining life expectancy at that exact age, adds the implied average age reached, and derives conditional survival-to-milestone percentages from the published survivor counts.

Limitations

This is a population-average period-life-table lookup, not a personalised medical prognosis.
The result does not adjust for smoking, BMI, alcohol intake, exercise, chronic illness, treatment, family history, or social conditions.
Future mortality conditions may differ from 2023, so a period table should not be read as a fixed forecast of future survival trends.

Disclaimer

This page provides official U.S. statistical averages only. It is not medical advice, not a prognosis, and not a substitute for discussing an individual health concern with a clinician.

Sources

See our calculation methodology and editorial standards for how this estimate is produced.

What a period life table actually shows

A period life table is a population snapshot. It asks what would happen to a hypothetical group of people if the mortality rates observed in one specific year stayed in place throughout the rest of life. That makes it useful for describing current mortality conditions, but it is not the same thing as a personalised prognosis.

This distinction matters because users often read a life-expectancy number as if it were a forecast for their own body, habits, and medical history. It is not. It is an official average built from population mortality patterns.

Why this version is intentionally narrow

The older tracker scope tried to add and subtract years for smoking, alcohol, exercise, BMI, sleep, chronic conditions, and family history. That is exactly where many public life-expectancy pages become less trustworthy, because they compress heterogeneous evidence into a neat fake-precision answer.

This implementation stays narrower on purpose. It uses only completed age and sex from the official 2023 U.S. life tables, then shows the average remaining years and a conditional survival table to later ages. It does not claim to know how much one habit or one diagnosis changes your personal lifespan.

How to read the milestone survival table

The milestone table answers a different question from the headline result. Instead of asking for average remaining years, it asks what proportion of people already at your current age would be expected to survive to later ages if the same mortality pattern continued.

That makes the table useful for context. It helps users see that life expectancy is not a cliff-edge number but an average inside a wider distribution of survival outcomes.

What this page cannot tell you

This page cannot tell you whether your own lifespan will be longer or shorter than average. It does not know your diagnoses, treatment response, smoking history, social conditions, genetics, or how mortality patterns will change in future years.

That is also why it should not be used as a reassurance tool or a scare tool. If a user has a specific medical concern, prognosis question, or family-history worry, that conversation belongs with a clinician rather than with a generic online average.

Frequently asked questions

Is this a prediction of how long I will live?

No. It is an official population-average lookup from the 2023 U.S. period life tables. It shows what average remaining years look like under that mortality pattern, not a personalised prediction for one person.

Why does the result not ask about smoking, BMI, or chronic conditions?

Because this safer version intentionally avoids fake-precision adjustments for individual risk factors. Those factors matter clinically, but compressing them into a generic online “years gained or lost” answer is much less defensible than a plain official life-table lookup.

What does “period life table” mean?

It means the table is based on the mortality conditions observed in one specific period, here 2023, and applies that pattern across the hypothetical cohort. It is a snapshot of current mortality conditions rather than a forecast of future mortality improvement or decline.

Why can two people the same age have very different real outcomes?

Because real lifespan varies with health status, treatment access, behaviour, social conditions, genetics, and chance. A life table average is useful context, but individual outcomes can differ substantially from the average.

Life Expectancy Calculator

42.7 years

Life expectancy calculator guide: using official U.S. period life tables without pretending to predict one person’s lifespan

What a period life table actually shows

Why this version is intentionally narrow

How to read the milestone survival table

What this page cannot tell you

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