Health & Fitness Tools
BMI, BMR, calorie, water intake, ideal weight, sleep calculator and more — all free, all in your browser. No signup required.
Free Health and Fitness Calculators
ToollyX provides 12 free health and fitness calculators that use medically recognised formulas to help you understand your body and plan your wellness goals. All calculations happen in your browser — your health data is completely private and never uploaded anywhere.
Body Measurement Calculators
The BMI Calculator computes your Body Mass Index using the standard WHO formula and classifies your result (underweight, normal, overweight, obese). The BMR Calculator uses the Mifflin-St Jeor equation — the most accurate currently available — to estimate your basal metabolic rate and total daily energy expenditure (TDEE) across five activity levels. The Body Fat Calculator uses the US Navy circumference method.
Wellness and Fitness Planning
- Calorie Calculator — Daily calorie targets for weight loss, maintenance or muscle gain.
- Water Intake Calculator — Personalised daily hydration target based on your weight.
- Sleep Calculator — Optimal bedtimes based on 90-minute sleep cycles.
- Macro Calculator — Protein, carbs and fat targets for your specific fitness goal.
- Heart Rate Zones — 5 training zones calculated from your maximum heart rate.
Disclaimer: All results are general estimates based on population-average formulas. They do not constitute medical advice. Consult a qualified healthcare professional for personalised health guidance.