Free tools
Free health calculators and guides.
Strength percentiles, daily calories, biological age, ear age and more — evidence-based, free to use on the page, no account needed. They're a small taste of Carthalis, which turns the same science into 140+ insights from your own data.
Strength & fitness
Percentile calculators, strength standards and lift benchmarks for everyday lifters.
- Calculator10 min readStrength Percentile CalculatorSee how your bench, squat, and deadlift rank against population benchmarks for everyday lifters.
- Calculator12 min readStrength Standards for Everyday LiftersEvidence-based benchmarks for bench press, squat, deadlift, push-ups, and grip strength.
- Calculator8 min readAverage Bench Press by AgeCompare your bench press to age- and sex-matched averages for educational fitness context.
- Calculator9 min readWhat Counts as a Strong Bench Press?Population benchmarks for strong bench press by age, sex, and experience level.
- Calculator8 min readAverage Squat by AgeEducational squat benchmarks to see how your lifts compare to typical ranges.
- Calculator7 min readHow Many Push-Ups Is Average?Push-up standards for general fitness — context before you train harder.
Nutrition
TDEE, calorie, macro and protein calculators for your daily targets.
- Calculator8 min readTDEE CalculatorEstimate total daily energy expenditure with Pavlidou RMR and activity multipliers.
- Calculator10 min readCalorie CalculatorPlan daily calories for weight loss, maintenance, or muscle gain with honest limits.
- Calculator12 min readMacro CalculatorProtein, carbohydrate, and fat targets aligned to your goals and activity.
- Calculator9 min readProtein CalculatorDaily protein needs for muscle building, fat loss, or maintenance — educational guidance.
Longevity & ear age
Biological age, life expectancy and ear age — honest educational estimates.
- Calculator7 min readEar Age TestA curiosity-friendly hearing wellness signal — take the interactive tone test on the article page.
- Calculator11 min readBiological Age CalculatorBiological age from five Life's Essential 8 habits (Lloyd-Jones 2022, McCrory 2021), with the method explained.
- Calculator10 min readLongevity CalculatorLive life-expectancy estimate built on Statistics Canada life tables + Li 2018 lifestyle modifiers; methodology and honest limits explained inline.
- Guide9 min readAI Longevity CalculatorTransparent, privacy-conscious longevity education — methodology before hype.
Sleep, medications & your data
Sleep scores, medication awareness, data ownership and voluntary research.
- Guide10 min readSleep Scores GuideWhat sleep scores measure, why wearables disagree, and what helps you rest.
- Guide9 min readMedication Interaction AwarenessEducational context on drug and supplement interactions — discuss with your provider.
- Guide10 min readWeb3 Health & Data OwnershipHow health data ownership fits Carthalis ethics — wellness education, not hype.
- Guide8 min readHealth Data & Research ParticipationVoluntary research, rewards and your data choices — what is real today.
Where the numbers come from
Where the numbers come from
| Where | What it uses |
|---|---|
| Calculators on these pages | Population strength percentile tables; the Pavlidou RMR equation with WHO/FAO activity multipliers for nutrition. |
| The Carthalis app (free account) | Targets that follow the activities you log, 140+ insights in your Digital Twin, and meal suggestions and logging. |
- Population strength percentile tables (the same ones Carthalis uses in the app)
- Pavlidou et al. 2023 — resting metabolic rate
- FAO/WHO/UNU 2004 — physical activity level multipliers
- How Digital Twin insights are calculated
Common questions
Carthalis free tools are health calculators and guides you can use without an account — strength percentiles, TDEE, calories, macros, protein, biological age, life expectancy and an ear age test — plus guides on sleep scores and medication interactions. They are a small taste of Carthalis; save your results with a free account. Wellness education, not diagnosis.
Selected strength, nutrition, and ear-age articles include inline calculators you can try on the page — look for the Calculator label on each card. Longevity and biological-age articles focus on methodology and personalized estimates inside the app after signup. Every result is educational wellness context, not a medical diagnosis.
You can read every guide and run on-page calculators without paying. A free account saves your results and adds the rest of Carthalis: 140+ insights in your Digital Twin, nutrition targets that follow your logged activity, meal suggestions and more.
No. Carthalis articles and calculators provide wellness education and self-awareness — not medical diagnosis, treatment, or emergency care. Discuss significant health decisions with a qualified clinician. Carthalis is not a medical device.
Strength articles anchor to the population percentile tables Carthalis uses in the app. Nutrition calculators on articles use the Pavlidou RMR equation with WHO/FAO physical-activity multipliers; in the app, estimates use the workouts you log and your wearable (optional). Longevity articles cite published aging and life-table methodology — always as educational estimates, not clinical certainty.
Start with whatever you have today
Pick a guide, try an on-page calculator where available, then create a free account to save your results and follow your health picture over time.
Create a free account to get your personalized version of these tools and follow them over time.