Weight Loss
Calculator Tools
A free library of 18 weight loss and fitness calculators. Find your calorie deficit, set your macros, estimate body fat, and protect lean muscle while losing weight on GLP-1 medications like semaglutide and tirzepatide.
Find your daily calorie targets and the deficit for steady weight loss.
Calorie Deficit Calculator
A calorie deficit is the only requirement for fat loss. This calculator helps you find the right deficit size — aggressive enough to see results, moderate enough to preserve muscle and maintain your energy.
TDEE Calculator
Your TDEE is the total number of calories your body burns in a day, including exercise, digestion, and unconscious movement. Knowing this number is the foundation of any effective nutrition plan.
BMR Calculator
Your Basal Metabolic Rate is the number of calories your body burns just to stay alive. It powers your heartbeat, breathing, brain activity, and cellular repair — and it accounts for 60-70% of the calories you burn each day.
Maintenance Calories Calculator
Maintenance calories — also called your energy balance point — is the number of calories you need to eat each day to keep your weight stable. This number is the foundation for every nutrition goal: cut below it to lose fat, eat above it to build muscle.
Weight Loss Calculator
Enter your current weight, goal weight, and calorie deficit to get a realistic timeline for reaching your target. This calculator accounts for the metabolic slowdown that occurs as you lose weight, giving you an accurate week-by-week projection.
Dial in protein, carbs, and fat — including muscle-sparing targets on GLP-1s.
Macro Calculator
Macros are the three calorie-containing nutrients your body needs in large quantities: protein, carbohydrates, and fat. Getting the ratio right makes the difference between losing fat while keeping muscle and simply losing weight.
Protein Calculator
Protein is the most critical macronutrient for body composition. Whether your goal is building muscle, losing fat, or maintaining health, getting the right amount of protein daily has a bigger impact on your results than any other dietary variable.
GLP-1 Protein Calculator
GLP-1 medications produce rapid weight loss, but up to 40% of that weight can come from lean muscle mass if nutrition is not optimized. This calculator helps you determine the protein intake needed to preserve your muscle while maximizing fat loss on GLP-1 therapy.
Keto Macro Calculator
The ketogenic diet shifts your body from burning carbohydrates to burning fat by drastically reducing carb intake. This calculator computes your ideal fat, protein, and carb targets to achieve and sustain nutritional ketosis.
Carb Cycling Calculator
Carb cycling alternates between high, medium, and low carbohydrate days based on your training schedule and goals. It gives you the performance benefits of carbs on training days and the fat-burning advantages of lower carbs on rest days.
Water Intake Calculator
Proper hydration affects everything from energy levels and cognitive function to digestion and workout performance. This calculator estimates your optimal daily water intake based on your body weight, activity level, climate, and whether you are on GLP-1 medications.
Intermittent Fasting Calculator
Intermittent fasting (IF) restricts when you eat, not what you eat. This calculator helps you choose a fasting protocol, set your eating window, and plan your meal timing for maximum adherence and results.
Measure where you are now and track changes over time.
BMI Calculator
Body Mass Index is a simple screening tool that uses your height and weight to categorize your weight status. While it has significant limitations for individuals, it remains widely used in healthcare as a starting point for health assessment.
Body Fat Calculator
Body fat percentage is a far more meaningful measure of health and fitness than weight alone. This calculator uses the US Navy circumference method to estimate your body fat from simple tape measurements — no equipment required.
Lean Body Mass Calculator
Lean body mass (LBM) is everything in your body that is not fat — muscle, bone, organs, water, and connective tissue. Knowing your LBM is essential for setting accurate protein targets, estimating your true metabolic rate, and tracking body recomposition progress.
Ideal Weight Calculator
There is no single "ideal" weight — it depends on your height, frame, muscle mass, and goals. This calculator provides estimates from four validated formulas to give you a range, not a rigid target.
Waist-to-Hip Ratio Calculator
Waist-to-hip ratio (WHR) measures how fat is distributed across your body. It is a more meaningful health indicator than BMI because it distinguishes between dangerous visceral fat around the organs and relatively benign subcutaneous fat stored in the hips and thighs.
Train smarter with strength benchmarks built for body recomposition.