Our Mission
HealthTools was created to provide a simple, fast, and free health & fitness calculators that anyone can use without registration or downloads. We believe essential tools should be accessible to everyone.
Why Choose Us?
- 100% Free — No signup, no hidden costs
- Privacy First — All calculations run in your browser
- Fast — Loads instantly on any device
- Mobile Friendly — Works perfectly on phones and tablets
- Minimal Ads — Non-intrusive advertising keeps us free
What You'll Find Here
HealthTools covers the numbers that matter for everyday health:
- BMI calculator — body mass index with healthy-range guidance
- Calorie & TDEE calculator — daily burn and deficit targets
- Macro calculator — protein, carbs and fat split for your goals
- Body fat calculator — Navy method percentage estimate
- Ideal weight calculator — five classic formulas compared
- Sleep calculator — bedtimes aligned to sleep cycles
Frequently Asked Questions
Are these health calculators medically accurate?
They use clinically established formulas (Mifflin-St Jeor for BMR, the US Navy body-fat method, standard BMI ranges), so the numbers are reliable estimates for most adults — but they are general references, not a medical diagnosis.
Is my data stored anywhere?
No. Every calculator runs entirely in your browser. The values you enter never leave your device, and nothing is uploaded or shared.
Which formula does the calorie calculator use?
The Mifflin-St Jeor equation, the formula most recommended in recent nutrition research, multiplied by activity multipliers to estimate total daily energy expenditure (TDEE).
Do I need to sign up or install anything?
No signup, no app, no downloads. Each tool works instantly on any phone, tablet or computer — just open the page and enter your numbers.