Health calculators you can trust.
Primary sources cited (WHO, CDC, NHS, NICE, ACOG). Calculations run in your browser — your data never leaves your device.
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EAT-26 Eating Attitudes Test
Free EAT-26 questionnaire online. 26 items, 5 minutes. The 1982 Garner screening tool for eating disorders. Cut-off 20. Instant interpretation.
mental-health - New
Greene Climacteric Scale — Menopause Symptom Self-Test
Take the validated 21-item Greene Climacteric Scale in 2 minutes. Greene 1998, anchored to NAMS 2022. Free, no signup — answers stay in your browser.
mental-health - New
M-CHAT-R — Toddler Autism Screener (16-30 months)
Free M-CHAT-R toddler autism screener — Robins 2014. 20 yes/no questions, 2 minutes, AAP-recommended at the 18 and 24-month visits.
pediatric
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ADHD Test (ASRS-5)
Take the ASRS-5 — a 6-question adult ADHD screener from the World Health Organization. 90 seconds. Free. No signup. Results stay in your browser.
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ASCVD Cardiovascular Risk Calculator
Free 2013 ACC/AHA cardiovascular risk calculator. Pooled Cohort Equations, validated for ages 40-79. 9 inputs, 30 seconds. Heart-attack risk in 10 years.
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AUDIT-C alcohol use screening test
AUDIT-C 3-item alcohol screen. Validated cut-offs for men and women (Bush 1998, USPSTF 2018). Score in 30 seconds, instant interpretation.
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Autism Test (AQ-10) — Adult Screening
Validated AQ-10 autism screening test for adults. Allison, Auyeung & Baron-Cohen (2012). 10 items, 2 minutes, NICE-recommended brief screen with.
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BMI Calculator
Free BMI calculator with WHO classification. Switch between kg/cm and lb/in. Sources cited (WHO, CDC, NHS), calculation runs in your browser.
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BMR & TDEE Calculator
Calculate your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) using the Mifflin-St Jeor equation — the formula clinicians.
metabolic
Latest articles
Articles →-
mental healthHow to score the UCLA 3-item loneliness scale
The UCLA loneliness scale comes in two versions under one name: 20 items scored to 80, or 3 items scored to 9. Mix them up and your number is meaningless. Here is the short form, scored correctly, plus the caveat few mention: there is no official clinical cutoff.
6/23/2026 · 7 min
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nutritionHow much protein you actually need to build muscle
Drink it within 30 minutes or you wasted the session. Hit 2 grams per kilo or you will not grow. Both lines sell powder, and neither survives the research. The real numbers are smaller, calmer, and the same whether you are 25 or 65.
6/17/2026 · 7 min
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mental healthAn Eating Disorder Is Not a Weight — 1 in 7 Are Men (Free EAT-26 Test)
The deadliest myth about eating disorders is that they look like a thin teenage girl. Most people with one are not underweight, roughly 1 in 7 are men, and binge-eating disorder is more common than anorexia and bulimia combined. BMI cannot see any of it.
6/15/2026 · 6 min
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sleepTeens Need 8-10 Hours but Get 6 — What 2 Hours Less Actually Does to Brain, Grades and Mood
The AAP and CDC both list 8-10 hours of sleep per night as essential for teens aged 13-18. Most American teens get 6 to 7. Those missing two hours produce a cognitive deficit roughly equal to a blood alcohol level of 0.05 —
6/5/2026 · 6 min
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nutritionThe EFSA 2.5L Rule: Why Most People Over-Drink Water (and the Real Number)
The 8-glasses-a-day advice is louder than the science. The European Food Safety Authority (EFSA) sets adequate intake at 2.5 L total water for men, 2.0 L for women — but that is total water, including 20-30% from food. From drinks alone you usually need 1.5 to 2.0 L.
6/4/2026 · 6 min
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mental healthOnly 2% Score Above 130 — What Your IQ Actually Means (Free 10-Question Test)
If your IQ test result was 115, you scored higher than 84 out of 100 people. Above 130? Top 2%. But your number on any short test moves 5-15 points day to day, and that variation is the whole reason psychologists never trust one score.
5/31/2026 · 6 min