See yourself clearly. Know what to do today.
Evidence-based fitness, nutrition, strength, and longevity articles from your personal health companion — try selected calculators on the page, then save results with a free account.
Calculators and tools
The Carthalis health calculators hub indexes every live fitness article, strength percentile calculator guide, and nutrition tool — each card shows whether you can try a calculator on the page or explore methodology and signup paths first. Browse evidence-based health calculators and fitness articles without surprise paywalls: read free, then save results with a free account when you are ready.
- strengthCalculator on page10 min read
Strength Percentile Calculator
See how your bench, squat, and deadlift rank against population benchmarks for everyday lifters.
Read guide - strengthCalculator on page12 min read
Strength Standards for Everyday Lifters
Evidence-based benchmarks for bench press, squat, deadlift, push-ups, and grip strength.
Read guide - strengthCalculator on page8 min read
Average Bench Press by Age
Compare your bench press to age- and sex-matched averages for educational fitness context.
Read guide - strengthCalculator on page9 min read
What Counts as a Strong Bench Press?
Population benchmarks for strong bench press by age, sex, and experience level.
Read guide - strengthCalculator on page8 min read
Average Squat by Age
Educational squat benchmarks to see how your lifts compare to typical ranges.
Read guide - strengthCalculator on page7 min read
How Many Push-Ups Is Average?
Push-up standards for general fitness — context before you train harder.
Read guide - nutritionCalculator on page8 min read
TDEE Calculator
Estimate total daily energy expenditure with Pavlidou RMR and activity multipliers.
Read guide - nutritionCalculator on page10 min read
Calorie Calculator
Plan daily calories for weight loss, maintenance, or muscle gain with honest limits.
Read guide - nutritionCalculator on page12 min read
Macro Calculator
Protein, carbohydrate, and fat targets aligned to your goals and activity.
Read guide - nutritionCalculator on page9 min read
Protein Calculator
Daily protein needs for muscle building, fat loss, or maintenance — educational guidance.
Read guide - ear-ageCalculator on page7 min read
Ear Age Test
A curiosity-friendly hearing wellness signal — take the interactive tone test on the article page.
Read guide - longevityCalculator on page11 min read
Biological Age Calculator
Live LE8-based biological-age estimate (Lloyd-Jones 2022 + McCrory 2021); deep methodology and Twin integration explained inline.
Read guide - longevityCalculator on page10 min read
Longevity Calculator
Live life-expectancy estimate built on Statistics Canada life tables + Li 2018 lifestyle modifiers; methodology and honest limits explained inline.
Read guide - longevityMethodology + signup9 min read
AI Longevity Calculator
Transparent, privacy-conscious longevity education — methodology before hype.
Read guide - otherMethodology + signup10 min read
Sleep Scores Guide
What sleep wellness scores measure, why wearables disagree, and how Twin tracks rest.
Read guide - otherMethodology + signup9 min read
Medication Interaction Awareness
Educational context on drug and supplement interactions — discuss with your provider.
Read guide - otherMethodology + signup10 min read
Web3 Health & Data Ownership
How health data ownership fits Carthalis ethics — wellness education, not hype.
Read guide - otherMethodology + signup8 min read
Health Data & Research Participation
Voluntary research participation and data choices — honest signup paths in Carthalis.
Read guide
Guides by topic
Guides by topic groups Carthalis articles into strength, nutrition, longevity, ear age, wellness education, and data ethics — so you can start with the cluster that matches your question.
Strength & fitness
Percentile calculators, strength standards, and lift benchmarks for everyday lifters.
Nutrition
TDEE, calorie, macro, and protein guides that support your daily targets.
Longevity
Wellness age and life-expectancy explainers with honest educational limits.
Ear age
Hearing wellness age as a curiosity-friendly signal — save multi-age estimates in app.
Wellness education
Sleep scores, medication awareness, and daily wellbeing context — not diagnosis.
Data & research
Data ownership, voluntary research, and how Carthalis works for you.
Methodology and sources
The Carthalis articles hub refers to a curated library of educational wellness guides whose numbers come from the same evidence bases that power in-app Twin scores — with honest limits. On-page article calculators use simplified models you can try without signing in; the Carthalis app adds activity-specific MET depth, longitudinal tracking, and 130+ wellness scores after you create a free account. Carthalis provides wellness education, not diagnosis.
| Surface | What you get |
|---|---|
| On-page article calculators | Simplified strength percentiles (STRENGTH_PERCENTILES), Pavlidou RMR + WHO/FAO PAL for nutrition — try on selected articles. |
| Carthalis app (after signup) | MET-based nutrition depth, Twin wellness scores, meal planning, and longitudinal tracking. |
- STRENGTH_PERCENTILES / percentile_engine
- Pavlidou et al. 2023 (RMR)
- FAO/WHO/UNU 2004 (PAL multipliers)
- Carthalis Twin wellness score presets
Explore score depth on Digital Twin → or see how Carthalis works →
- Wellness education, not diagnosis.
- Carthalis is not a medical device.
Common questions
Start with Carthalis articles
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.