6 health tools
Health tools
Simple reference points for your wellbeing.
Available Health tools
BMI Calculator
Free BMI calculator to estimate body mass index from height in centimetres and weight in kilograms, then view its reference range.
Calorie Calculator
Estimate daily calorie needs from your body and activity profile.
Sleep Calculator
Find estimated bedtimes or wake-up times using sleep cycles.
Pace Calculator
Calculate distance, elapsed time, or running pace.
Heart Rate Zone Calculator
Estimate broad exercise heart-rate zones from a maximum rate.
One Rep Max Calculator
Estimate one-repetition maximum from a submaximal lift.
Helpful answers
Frequently Asked Questions
Useful details that apply across BiyoTool’s health tools.
No. These tools provide formula-based reference points from the values you enter. They are not a diagnosis, treatment plan, or substitute for advice from a qualified health professional.
Health formulas simplify individual differences into a small set of inputs and assumptions. Measurement method, personal variation, and the selected formula can all produce a different result.