Health & Fitness Calculators

Free, evidence-based calculators to plan your nutrition. No medical jargon—just simple, accurate numbers you can use today.

Flagship Calculators

Start with these comprehensive tools designed for real results.

Flagship

TDEE Calculator

Calculate your Total Daily Energy Expenditure and get personalized calorie targets for fat loss, muscle gain, or maintenance with optimized macro breakdowns.

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Protein Calculator

Find out exactly how much protein you need daily based on your weight, goal, and activity level. Includes per-meal targets and real food examples.

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Intermittent Fasting Calculator

Pick your fasting protocol (16:8, 18:6, 20:4, OMAD, 5:2) and get your exact eating window, fasting schedule, and what to drink during your fast.

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Creatine Water Calculator

Calculate exactly how much water you need daily when taking creatine. Supports maintenance and loading phases with activity and climate adjustments.

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Core Calculators

Calculator

BMR Calculator

Estimate resting metabolism and maintenance calories using the Mifflin-St Jeor equation.

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Calorie Goal Suggester

Get target calories and starter macro suggestions for your goal.

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Profile-Based Tools

Calculators tailored to specific user profiles and goals.

Profile tool