Your Complete Health Toolkit
25 live health tools across 9 categories, with more planned. BMI, pregnancy, nutrition, mental health, fitness and more. No sign-up. Everything runs in your browser.
Popular Tools
Browse by Category
Health Calculators
9 tools
BMI, TDEE, body fat, heart rate & more
- BMI Calculator
- TDEE Calculator
- Ideal Weight
- +6 more
Women's Health
4 tools
Pregnancy, ovulation, cycle tracking
- Pregnancy Calculator
- Ovulation Calculator
- Cycle Tracker
- +1 more
Baby & Child
4 tools
Growth percentile, feeding, contraction timer
- Baby Growth Percentile
- Child BMI Calculator
- Contraction Timer
- +1 more
Fitness & Performance
7 tools
Calories burned, 1RM, VO2 max, running pace
- Macro Calculator
- Workout Planner
- Calories Burned
- +4 more
Nutrition
8 tools
Nutrient encyclopedia, deficiency checker, GI lookup
- Nutrient Encyclopedia
- Vitamin Deficiency Checker
- Food Nutrition Lookup
- +5 more
Mental Health
5 tools
Burnout, anxiety, depression, stress assessment
- Stress Level Calculator
- Burnout Assessment
- Anxiety Level Checker
- +2 more
Chronic Disease
4 tools
Diabetes risk, A1C, blood sugar, kidney function
- Diabetes Risk Calculator
- A1C to Blood Sugar
- Blood Sugar Tracker
- +1 more
Lifestyle
6 tools
Sleep, fasting, BAC, life expectancy
- Sleep Calculator
- IF Window Planner
- BAC Calculator
- +3 more
Pet Health
2 tools
Pet age in human years, blood type compatibility
- Pet Age Calculator
- Blood Type Compatibility
How It Works
Choose a Category
Browse 9 health categories — from BMI to nutrition to mental health.
Enter Your Details
Input your measurements or dates. Supports metric and imperial units.
Get Results Instantly
Visual gauges, timelines, charts, and personalized health insights.
FAQ
Is FreeBMIKit really free?
Yes, 100% free. No sign-up, no usage limits. Use the 25 live health tools without restriction; planned tools are clearly marked until they are ready.
Is my health data safe?
Absolutely. All calculations happen entirely in your browser. No personal health data is ever sent to any server.
How many tools are included?
FreeBMIKit has 25 live tools and planned additions across 9 categories — health calculators, women's health, baby & child, fitness, nutrition, mental health, chronic disease, lifestyle, and pet health.
How accurate are the results?
Our calculators use standard medical formulas (Naegele's rule, Mifflin-St Jeor, Harris-Benedict, etc.). They provide estimates — always consult a healthcare professional for medical decisions.
Are the nutrition tools evidence-based?
Yes. Nutrient data is sourced from USDA FoodData Central and WHO/NIH reference values. All content includes citations and carries a medical disclaimer.
Do I need to install anything?
No. FreeBMIKit works entirely in your browser. No downloads, no extensions, no sign-up required.