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Health & Nutrition Calculators
Evidence-based health calculators for TDEE, calorie deficit, macros, BMI, body fat, and BMR. Peer-reviewed formulas — no sign-up required.
Health & Nutrition Calculators
Evidence-based calculators for calories, body composition, and nutrition — backed by peer-reviewed research.
Calorie & Nutrition Funnel
Calorie Calculators Hub
Step-by-step funnel: BMR → TDEE → Calorie Deficit → Macros. Find your complete calorie and macro profile.
Calorie Calculator
Interactive goal quiz to find your daily calories and macros.
BMR Calculator
Basal Metabolic Rate using Mifflin-St Jeor equation.
TDEE Calculator
Total daily calorie burn based on BMR and activity level.
Calorie Deficit
Daily target for weight loss, gain, or maintenance.
Macro Calculator
Protein, carbs, and fat targets based on your goal.
BMI Calculator
Body Mass Index with visual gauge and healthy weight range.
Body Fat %
Navy, Army, or basic method body composition estimate.
TDEE for Women
Total daily energy expenditure tailored for women.
TDEE for Men
Total daily energy expenditure tailored for men.
Calorie Calculator for Weight Loss
Calorie targets optimised for fat loss.
Calorie Calculator for Muscle Gain
Calorie targets optimised for building muscle.
Related Guides
BMI vs Body Fat: Which Metric Matters?What Is TDEE and How to Calculate It?TDEE vs BMR: What's the Difference?How to Calculate Calorie DeficitBest Macro Split for Weight Loss vs Muscle GainCalories to Lose 1 Pound Per WeekAre TDEE Calculators Accurate?Navy Body Fat Calculator GuideArmy Body Fat StandardsUSMC Body Fat StandardsMilitary Branches Body Fat ComparedMilitary Tape Test GuideTape Test vs DEXA
How to Use This Calculator
- Choose a health calculator below.
- Enter your measurements.
- Get personalized results based on peer-reviewed research.
The Formula
Each calculator uses its own formula — see individual pages for methodology and citations.Learn More
Health
BMI vs Body Fat: Which Metric Actually Matters?
BMI is quick but flawed. Body fat tells the real story. Here's when each matters.
HealthWhat Is TDEE and How Do You Calculate It?
TDEE is the total calories you burn per day. Here's how to calculate yours.
HealthHow to Calculate Calorie Deficit for Weight Loss (Step by Step)
Step-by-step: find your TDEE, subtract 500, and track progress.
HealthAre TDEE Calculators Accurate? What the Research Says
TDEE formulas are estimates, not gospel. Here's how accurate they really are.
Frequently Asked Questions
Start with the Calorie Calculator hub — it guides you through BMR, TDEE, deficit, and macros step by step.