Free tools
Free health calculators
Instant, source-cited tools - no account, and nothing is sent anywhere unless you submit a form to see your own result.
Chronic condition tools
MIDAS migraine score
5 questions, your migraine disability score in 2 minutes.
Open calculatorAsthma symptom control score
4 GINA questions, your asthma control level in a minute.
Open calculatorBlood Pressure Category Calculator
Enter a reading, see your ESC/ESH category instantly.
Open calculatorSodium & salt intake calculator
Compare your sodium intake to WHO, DGE and AHA.
Open calculatorPeak Flow Calculator
Compare a peak flow reading against the EU-scale predicted normal for your age, height, and sex.
Open calculatorBody & substance tools
Sleep tools
Chronotype test
Take the 5-question rMEQ to find out if you're a morning type, evening type, or neither.
Open calculatorSleep Cycle Calculator
Enter a bedtime or wake time, get cycle-aligned options.
Open calculatorJet Lag Planner
Enter your flight details, get a day-by-day light and sleep shift plan.
Open calculator