Health answers without handing over your health data
Calculate body composition, calorie and macro targets, hydration, training zones, strength, lifestyle age and sleep debt. No sign-up, no trackers, and no server reading your inputs.
Everyday essentials
Foundational health calculators
Body composition
BMI, Navy body fat, waist-to-hip ratio and lean mass together.
CalculateTDEE & calorie targets
Estimate maintenance, cutting and lean-bulk calories.
CalculateHydration goal
Adjust a daily water target for weight, climate and exercise.
CalculateMacronutrient splitter
Turn a calorie goal into protein, carb and fat grams.
CalculateTrain and recover
Fitness & longevity tools
1-rep max estimator
Estimate your maximum lift from a submaximal set.
CalculateHeart rate zones
Personalized training zones using heart-rate reserve.
CalculateLifestyle age estimator
Explore how everyday habits may shift a wellness-age score.
CalculateSleep debt
Visualize your weekly deficit against a personal sleep goal.
CalculateIt cannot phone home
There is no API or analytics. A Content Security Policy limits browser connections to this site itself, so third-party requests are blocked.
Your answers stay here
Every formula runs as JavaScript in this tab. Measurements, habits and results are never uploaded to a server.
Nothing is remembered
No account, cookies, local storage or query-string data. Refresh or close the tab and your inputs are gone.
Location without location tracking
The hydration tool can ask the browser for your latitude to suggest a broad climate band. Coordinates are used once, in memory, and are never sent or stored. Manual climate selection works just as well.