10 free tools

Health & Fitness tools

Useful personal health estimates for planning, tracking, and better habits.

Calculate adult body mass index and see the standard weight category.

Estimate daily calories using the Mifflin–St Jeor equation and activity level.

Split daily calories into protein, carbohydrates, and fat targets.

Estimate body fat percentage using the U.S. Navy circumference method.

Compare several evidence-based adult ideal weight formulas.

Estimate a practical daily hydration target from weight and activity.

Convert distance and finish time into pace and average speed.

Estimate a due date and current pregnancy week from the last period.

Estimate the fertile window from cycle dates and average cycle length.

Find suggested bedtimes or wake times based on 90-minute sleep cycles.