Why these numbers matter

Whether you're just starting a fitness journey or fine-tuning an existing routine, three numbers make almost every nutrition decision easier: your BMI, your daily calorie needs, and your daily protein target. Together they give you a realistic starting point instead of guessing — and they pair naturally with the high-protein recipes on this site, since knowing your targets makes it much easier to pick the right recipe for your goal.

How to use this tool

Pick the tab that matches what you want to know, fill in your height, weight, age, and activity level, and get an instant estimate. The BMI calculator gives you a quick weight-category screening. The calorie calculator estimates your maintenance calories using the Mifflin-St Jeor formula, plus suggested ranges for fat loss or muscle gain. The protein calculator translates your weight and goal into a daily gram target, split across meals.

A quick note

These calculators give general estimates based on common formulas used in nutrition coaching — they are not medical advice and don't account for every individual factor (medical conditions, medications, body composition, etc.). For a plan tailored to you, please talk to a doctor or registered dietitian, especially if you have diabetes, a heart condition, or are pregnant or breastfeeding.