Free Health Calculators & Wellness Tools
Get accurate estimates for calorie needs, THC detection times, calories burned, hydration status, and more. Simple, science-based tools to help you understand and improve your health.
Explore Our Tools✅ Accurate & Easy to Use
Built with proven formulas (Mifflin-St Jeor, MET values, WUT criteria) and clear explanations.
✅ Completely Free
No sign-up, no paywalls. Use as often as you like.
✅ Educational Content
Each tool comes with helpful explanations, FAQs, and practical tips.
Our Most Popular Health Calculators
THC Detection Calculator
Estimate how long THC stays in your system (urine, blood, saliva, hair).
Use Tool →Daily Calorie Needs (TDEE)
Calculate calories for weight loss, maintenance, or gain (US units).
Use Tool →Calories Burned Calculator
See how many calories you burn during walking, running, cycling, HIIT & more.
Use Tool →Why Choose HealthCompass365?
- Tools designed with real science (Mifflin-St Jeor, Compendium of Physical Activities, etc.)
- Clear explanations and disclaimers — we prioritize accuracy and transparency
- Regularly updated content based on the latest available research
- Simple, fast, and mobile-friendly experience
- Thousands of people use our tools every month
Latest Wellness Articles & Guides
Breathing Techniques for Stress & Anxiety
Evidence-based exercises to reduce anxiety and improve focus in minutes.
Read More →How Long Does THC Stay in Your System?
Detailed guide to detection windows and factors that influence results.
Read More →Marijuana Drug Tests: Desmystified
Learn about the different types of marijuana drug tests, how they work, and their flaws.
Read More →Frequently Asked Questions
How accurate are the calculators?
They use well-established scientific formulas and provide good estimates for most people. Individual results can vary based on genetics, body composition, and lifestyle.
Is this medical advice?
No. All content and tools are for educational purposes only. Always consult a qualified healthcare professional for personalized medical advice.
Can I use these tools every day?
Yes! Many users check their calorie needs, hydration, or calorie burn regularly to track progress and build better habits.