Health & Wellness Tools
Free calculators and simple trackers for everyday wellness. Everything runs in your browser — for general information only, not medical advice.
All Health & Wellness Tools
12 tools · estimates and reference values, not a diagnosis. Consult a professional for personal advice.
Water Intake Calculator
Estimate a daily water goal and log glasses with a simple tracker.
TDEE Calculator
Estimate daily calories (BMR × activity) with a macro reference.
BMI Calculator
Body Mass Index with WHO adult reference categories.
Ideal Weight Calculator
Compare Devine, Robinson, Miller and Hamwi reference formulas.
Body Fat Calculator
Estimate body fat % with the US Navy tape method or RFM.
Sleep Calculator
Find bedtimes or wake-up times based on 90-minute sleep cycles.
Fasting Timer
Track a fasting window with presets, pause and a progress bar.
Period Tracker
Estimate upcoming periods from your cycle. Stays on your device.
Pregnancy Due Date Calculator
Estimated due date and weeks from LMP or conception date.
Heart Rate Zone Calculator
Five training zones from max HR, with optional Karvonen method.
Health Habit Tracker
Tick daily habits, see streaks and your last 7 days.
Walking Calorie Calculator
Estimate calories, steps and distance for a walk.
Frequently asked questions
Are these health tools free?
Yes. All Health & Wellness tools are free to use with no sign-up.
Is my health data sent anywhere?
No. Calculations run in your browser. Trackers (water, fasting, period, habits) save only to this browser's local storage, and you can delete that data at any time. Analytics record only which tool was used, never your inputs or results.
Are these tools medical advice?
No. They give general estimates and reference values for information only. They do not diagnose, treat or replace advice from a doctor or qualified health professional.
How accurate are the estimates?
They use published formulas such as Mifflin-St Jeor, WHO BMI categories, the US Navy method and Naegele's rule. Real bodies vary, so treat results as a starting point and talk to a professional about your situation.