Home/Health & Fitness

Health & Fitness

Explore common adult health and fitness estimates with formulas, limitations and responsible interpretation shown alongside each result.

/

BMI Calculator Calculate your body mass index from your height and weight in metric or imperial units. Body Fat Percentage Calculator A circumference estimate with fat and lean mass shown separately. Calorie Calculator Daily calories to lose, maintain or gain weight, from your BMR and activity. Due Date Calculator Your estimated due date from your last period, conception or an IVF transfer. Ideal Weight Calculator The healthy weight range for your height, and what the classic formulas say. Macro Calculator Protein, carbohydrate and fat targets for your calories and your goal. One-Rep Max Calculator Estimate your one-rep max from a safer submaximal set. Water Intake Calculator Adult water-intake references, including food, beverages and exercise.

No tools here match that — search all tools instead.

About this collection

Useful estimates, clearly separated from medical advice

Health calculators turn population formulas and reference ranges into a personal estimate. That can be useful for planning a run, comparing training loads or starting a conversation about weight and nutrition. It cannot diagnose a condition or account for medical history, medication, pregnancy, disability, age-specific guidance or every difference between individuals.

Each tool identifies the method it uses and explains its main limitations. Treat a result as one data point, look for trends rather than reacting to a single number, and consult a qualified healthcare professional before making a significant health decision—especially for children, pregnancy, unexpected symptoms or an existing condition.

Other categories

Finance & Money Generators & Makers Converters & Math PDF & Documents Developer Tools Text & Writing Business & Ecommerce Date & Time