All tools

Every calculator, in one place.

10 free clinical calculators, grouped by what they do. Each one cites its formula and the published guideline it's based on.

Body composition

Body Mass Index with WHO classification and personalized health interpretation.

Body Fat Calculator

Estimate your body fat percentage using the US Navy method with ACE classification.

Ideal Weight Calculator

Find your ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.

Nutrition & metabolism

Calorie Calculator

Daily calorie needs for weight loss, maintenance, or muscle gain. TDEE-based, customizable.

Macro Calculator

Daily protein, carbs, and fat targets — balanced, high-protein, keto, or low-carb splits.

Basal Metabolic Rate using the Mifflin-St Jeor equation. The starting point for any calorie plan.

Water Intake Calculator

Calculate how much water you should drink daily based on your weight and activity level.

Cardiovascular & kidney

Blood Pressure Analyzer

Enter your BP readings and get ACC/AHA stage classification with actionable guidance.

Estimated Glomerular Filtration Rate using the CKD-EPI 2021 race-free equation.

Maternity

Pregnancy Due Date

Estimated due date, current week, and trimester from LMP, conception, or IVF transfer.

Compare across tools

Use BMI plus body fat percentage for a fuller body-composition picture. Use BMR plus the calorie calculator to plan a sustainable deficit. Use the calorie calculator and macro calculator together for a complete daily plan.

BMI vs Body fat →Methodology →