Frequently Asked Questions
Common questions about our free wellness tools.
Are your wellness calculators free?
Yes, all our wellness calculators are completely free to use. No account required, no subscription, no hidden costs.
Do you store my personal data?
No. All calculations happen in your browser. We never transmit or store your personal health data on any server.
How accurate are the calculators?
Our calculators use well-established formulas from sleep science, nutrition research, and wellness literature. They provide useful estimates and personalised guidance, but are not a substitute for professional medical advice.
What is sleep debt and how do I recover from it?
Sleep debt is the cumulative difference between how much sleep you need and how much you actually get. You can recover by consistently getting slightly more sleep than usual — typically 30–60 minutes extra per night — over a period of weeks.
How much water should I drink per day?
A common baseline is half your body weight in ounces. For example, a 150-pound person would aim for about 75 ounces daily. Actual needs vary based on activity level, climate, and individual factors — use our Hydration Calculator for a personalised estimate.
Do I need to sign up or create an account?
No account is required. Start using any tool immediately without signing up or providing personal information.
Can I use your tools on mobile?
Yes, all our wellness calculators are fully responsive and work on smartphones, tablets, and desktop computers.
What is burnout and how do I recognise it?
Burnout is a state of chronic stress leading to physical and emotional exhaustion, detachment, and reduced effectiveness. Warning signs include persistent tiredness that doesn't improve with rest, difficulty concentrating, cynicism about work, and frequent illness.