Is this score validated?

No. The domains are drawn from prospective cohort and burden-of-disease literature, but the weights are ours and were never fitted to mortality data. Treat the total as a prompt, not a measurement.

Why does my score feel too low?

Because the weights are deliberately concentrated on the few things with the largest effects — smoking, aerobic volume, central adiposity, social connection, sleep. Doing many small things well does not compensate for one of those.

LLL Longevity Score

Enter your numbers

16 questions. Questions that only apply to some people appear once your earlier answers decide that they do.

From your health data

6 of these questions can be answered from lab results and device data you have already connected: Moderate-to-vigorous aerobic activity per week, Resistance-training sessions per week, Hours per day sitting while awake, Typical sleep per night, Waist circumference, Height. Connect them once in your member account and they arrive here pre-filled and labelled as coming from your health data — and you can always type over the value.

Set up health data in your member account

This public page never reads your health data. Pre-filling happens inside the signed-in app, which is a separate, access-controlled surface.

Tobacco or nicotine use

Moderate-to-vigorous aerobic activity per week(min/wk)From your health data — connect to fill this automatically

Brisk walking counts if it leaves you slightly breathless.

Resistance-training sessions per weekFrom your health data — connect to fill this automatically

Hours per day sitting while awake(h)From your health data — connect to fill this automatically

Servings of vegetables and fruit per day

How often do you eat ultra-processed food?

Packaged snacks, sweetened drinks, ready meals, processed meat.

How often do you eat fish, legumes or nuts?

Alcohol units per week

One unit is 8 g of ethanol: roughly half a pint of ordinary-strength beer or a single small glass of wine.

Typical sleep per night(h)From your health data — connect to fill this automatically

How often do you wake feeling refreshed?

Waist circumference(in)OptionalFrom your health data — connect to fill this automatically

Measured at the midpoint between the lowest rib and the top of the hip bone, at the end of a normal breath out. Enter this in in. We convert it to cm for the formula.

Height(in)OptionalFrom your health data — connect to fill this automatically

Enter this in in. We convert it to cm for the formula.

How often do you have meaningful contact with people you trust?

How often do you feel your stress is manageable and your days have purpose?

Are you up to date on the screenings and vaccinations recommended for your age?

YesNo

How often do strength, balance or mobility limit what you do?

Answer "never" if nothing is limited.

Nothing you type is stored unless you are signed in and ask us to save it.

How this is calculated

Formula version lll-longevity-score-1.0.0

Fifteen self-reported domains are each scored 0 to 1 and multiplied by a published point weight, then summed and expressed out of 100. The weights are: smoking 15, aerobicMinutes 12, strengthSessions 6, sittingHours 4, produceServings 6, ultraProcessed 6, plantAndFishProtein 3, alcoholUnits 8, sleepDuration 7, sleepQuality 3, waistToHeight 8, socialConnection 8, stressAndPurpose 6, preventiveCare 4, functionalCapacity 4. Domain selection is informed by prospective cohort and burden-of-disease literature; the weights themselves are LLL editorial judgement and were not fitted to any outcome.

What it cannot do

Not a validated instrument. No published calibration, no validated cut-points, no interval.
All inputs are self-reported and self-report bias is large and directional for activity, alcohol and diet.
The weights are editorial. Reasonable alternative weightings change the total by several points.
Genetics, medical history, medication, income, air quality and access to care are not inputs.
The five-factor lifestyle literature it draws on is observational; residual confounding is expected and the score must not be read as a causal estimate of years gained.

Sources

Li Y et al. Impact of Healthy Lifestyle Factors on Life Expectancies in the US Population. Circulation 2018;138:345-355DOI 10.1161/CIRCULATIONAHA.117.032047 (opens in a new tab)PMID 29712712 (opens in a new tab)
GBD 2019 Risk Factors Collaborators. Lancet 2020;396:1223-1249DOI 10.1016/S0140-6736(20)30752-2 (opens in a new tab)PMID 33069327 (opens in a new tab)
Holt-Lunstad J et al. Social Relationships and Mortality Risk: A Meta-analytic Review. PLoS Med 2010;7:e1000316DOI 10.1371/journal.pmed.1000316 (opens in a new tab)PMID 20668659 (opens in a new tab)
Ekelund U et al. Dose-response associations between accelerometry measured physical activity and sedentary time and all cause mortality. BMJ 2019;366:l4570DOI 10.1136/bmj.l4570 (opens in a new tab)PMID 31434697 (opens in a new tab)

The formula version is pinned so that a result you saved or shared can be reproduced. When we change a coefficient, the version changes and old results stay attributed to the version that produced them.

Questions people ask

Is this score validated?: No. The domains are drawn from prospective cohort and burden-of-disease literature, but the weights are ours and were never fitted to mortality data. Treat the total as a prompt, not a measurement.
Why does my score feel too low?: Because the weights are deliberately concentrated on the few things with the largest effects — smoking, aerobic volume, central adiposity, social connection, sleep. Doing many small things well does not compensate for one of those.