❓ Frequently Asked Questions

HealthHub is a free online health and wellness resource providing evidence-based health information and interactive tools. We offer calculators, guides, and articles covering nutrition, fitness, mental health, and disease prevention — all designed to help you make informed health decisions.

Yes! All of our health tools, calculators, and articles are completely free to use. We believe everyone deserves access to quality health information regardless of their financial situation.

We review and update our content regularly — at least once per year for every article, and whenever new scientific research warrants a change. All tools are tested and refined based on user feedback.

Our content is created by a team of health professionals including nutritionists, certified fitness trainers, and medical writers. All content undergoes review by our editorial team before publication to ensure accuracy.

A common guideline is about 8 glasses (64 ounces) per day, but individual needs vary based on body size, activity level, and climate. Our Water Intake Tracker can give you a personalized estimate based on your weight and activity level.

A balanced diet includes a variety of fruits, vegetables, whole grains, lean proteins, and healthy fats. It limits processed foods, added sugars, and excessive sodium. Think of filling half your plate with vegetables and fruits at each meal. Check out our balanced nutrition guide for more details.

Your calorie needs depend on your age, gender, weight, height, and activity level. Our Calorie Calculator uses the Harris-Benedict equation to estimate your Total Daily Energy Expenditure (TDEE), helping you understand how many calories you burn in a day.

The WHO recommends at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity per week, plus muscle-strengthening activities on 2+ days. That's about 30 minutes a day, 5 days a week. Our Daily Exercise Guide has beginner-friendly routines.

Heart rate zones are ranges that show how hard your heart is working during exercise. Our Heart Rate Zones Calculator helps you find your max heart rate and shows the five training zones — from light exercise to maximum effort.

BMI is a useful screening tool but has limitations — it doesn't distinguish between muscle and fat, and doesn't account for age, gender, or ethnicity differences. Use our BMI Calculator as one indicator among many, not the sole measure of your health.

No. The content on HealthHub is for informational purposes only and is NOT a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for any medical concerns. Read our full medical disclaimer.

Generally, normal blood pressure is below 120/80 mmHg. Elevated blood pressure is 120-129 / below 80. High blood pressure (Stage 1) is 130-139 / 80-89, and Stage 2 is 140/90 or higher. Our Blood Pressure Guide explains the categories and what they mean.

Most adults need 7-9 hours of sleep per night. Children and teenagers need more. Quality matters as much as quantity — our Sleep Calculator helps you plan an optimal sleep schedule based on sleep cycles.

If you're experiencing a medical emergency — chest pain, difficulty breathing, severe bleeding, signs of stroke — call your local emergency number immediately (911 in the US, 112 in Europe). HealthHub is not equipped to handle emergencies. Please seek professional medical help right away.

We use Google AdSense for advertising, which means ads are automatically selected based on page content and user interests. We do not control specific ad content, but we maintain editorial independence — advertising does not influence our health information.