Interactive
Calculators & checks
Calculate instead of guessing. Every tool runs in your browser, nothing is sent, every result can be shared as an image.
Biological age
Longevity Score
Estimates a biological age from age, sleep, exercise, strength training, diet, smoking, alcohol, stress, weight, sitting time and social contact using epidemiological reference values, and shows which changes bring the most years.
OpenHealthy aging
Fitness Age Calculator
Compares five simple self-tests with age norms for men and women and calculates a functional fitness age, with the weakest link as your first training goal.
OpenBasal rate & needs
Calorie Calculator
Calculates basal metabolic rate with Mifflin-St Jeor, total expenditure via the activity factor and derives calorie targets with a sensible deficit or surplus, including macro split.
OpenNutrition
Protein Calculator
Determines daily protein needs by body weight, goal (maintenance, muscle gain, weight loss, over 65) and activity, spreads it over three to four meals and shows example portions from animal and plant sources.
OpenBMI & body fat
Body Fat Calculator
Calculates body fat with the US Navy circumference method, BMI, fat-free mass and FFMI and classifies the values from athletic to elevated.
OpenTarget weight
Weight Loss Planner
Turns weight, target and weekly pace into a calorie deficit, an arrival date and the protein amount that prevents muscle loss, with a warning against losing too fast.
OpenTime window
Intermittent Fasting Planner
Plans 16:8, 18:6, 14:10 or 5:2 around your day, shows eating window and fasting time as a timeline and explains from which hour glycogen, fat burning and autophagy set in.
OpenHidden sugar
Sugar Calculator
Adds up the sugar content of typical drinks and foods of a day in grams and cubes, compares with the WHO limit of 25 grams and shows the three largest sources.
OpenSleep cycles
Sleep Calculator
Calculates from wake-up or bedtime the moments when a sleep cycle ends, with a buffer for falling asleep, and shows how many cycles and hours that gives.
OpenLast coffee
Caffeine Calculator
Adds up the caffeine of your drinks with their times, calculates the breakdown with a five-hour half-life and shows the remaining amount at bedtime as a curve across the day.
OpenTraining
Heart Rate Zones
Calculates maximum heart rate after Tanaka, heart rate reserve and five zones after Karvonen and explains what each zone trains and how much time per week makes sense there.
OpenMovement
Step Calculator
Converts steps into distance, time and calories, shows where you stand against the goal of 7,000 to 10,000 steps and what a daily 20-minute walk adds up to in a year.
OpenReading lab values
Blood Test Check
Classifies eleven common lab values into guideline reference ranges, shows a traffic light per value, explains what an outlier can mean and what you can change before your next appointment.
OpenMental load
Stress Check
Rates load and recovery in ten questions modelled on common stress scales, shows a score from 0 to 100 in four levels and names measures that fit the level.
OpenWhat you really need
Supplement Check
Sorts 16 common supplements by your inputs into useful, optional and unnecessary, with dose range, intake note and the lab value that settles the question.
OpenSun & skin
Vitamin D Calculator
Estimates vitamin D production in the skin from sun elevation by month and latitude, skin type, duration and exposed skin area and compares with daily needs, with a note on the winter gap.
OpenAlcohol
Blood Alcohol Calculator
Calculates blood alcohol concentration with the Widmark formula and elimination of 0.1 per mille per hour, shows the time to sober and explains what alcohol does to sleep and recovery.
OpenTo share
Longevity type quiz
Eight questions, six types, one result with an image to share: find out whether you are an Athlete, Epicurean, Optimizer, Zen, Naturalist or Socializer.
StartWith a personal answer
Programs that turn a result into a plan
Longevity plan
Answer twelve questions, see your estimated biological age and, if you like, request a personal plan with the three levers that bring you the most healthy years.
OpenBlood test analysis
Enter values from your last lab report, see each one with a traffic light and explanation and, if you like, request a personal analysis that reads the values in context and prepares questions for your doctor’s appointment..
OpenNutrition plan
Calculate your basal rate and needs, see calorie target and macros and, if you like, request a nutrition plan that fits your daily life, your taste and your goal.
OpenSleep coaching
Enter your wake-up time, see the best bedtimes by sleep cycles and, if you like, request sleep coaching that sorts rhythm, light, caffeine, bedroom and racing thoughts within four weeks..
OpenSupplement consultation
Enter diet, sun, age and goals, see your list sorted into useful, optional and unnecessary and, if you like, request a consultation that clarifies dose, timing, interactions and lab control.
Open