Fitness & Health Calculators

Practical tools for common fitness & health questions, built with clear inputs and transparent formulas.

Calculate body mass index using US or metric units and see the standard BMI category.

Estimate daily calories using BMR, activity level, and common weight goals.

Estimate body fat percentage from sex, age, height, and weight using a BMI-based screening method.

Estimate basal metabolic rate using age, sex, height, and weight.

Compare common adult ideal weight formulas from sex and height.

Calculate pace, speed, and finish-time relationships for running, walking, or cycling.

Estimate pregnancy week, days pregnant, trimester, and due date from last menstrual period.

Estimate a likely conception date window from due date or last menstrual period.

Estimate pregnancy due date from last menstrual period, conception date, or IVF transfer date.