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Tool Description
Calorie Needs / TDEE Calculator Estimate RMR and total daily energy expenditure, with calorie targets for maintenance, fat loss, or gain.
Macronutrient Split Calculator Break down your daily calories into protein, fat, and carbs with science-backed defaults and charts.
Calorie Deficit Timeline / Cut–Bulk Planner Project your timeline for cutting, bulking, or maintaining with calorie targets, charts, and weekly roadmap.
Body Fat % Estimator (Navy & Skinfold) Estimate body fat % with Navy circumference or Jackson–Pollock skinfolds, then view fat vs. lean mass with charts.
Carb Cycling Planner Plan low/medium/high carb days around training with fixed protein & fat; carbs flex to hit targets. Includes charts and weekly summary.
Target Weight Calculator Calculate your target weight based on your goals and body composition.
Advanced BMI Calculator Calculate your Body Mass Index (BMI) with advanced options for more accuracy.
Resistance Bike Intervals Perform resistance bike intervals with warm up and cool down.

Free Tools

User Guide
Tool Description
RMR Calculator Calculate your Resting Metabolic Rate.
Hydration & Electrolyte Needs Build a pre/intra/post hydration plan with sodium, potassium, and magnesium targets — open to all visitors.
Advanced Hydration Calculator Estimate daily hydration using weight, age, activity, environment, and food intake.
METs Calculator Estimate calories burned from MET values.
1RM Calculator Estimate the maximum weight for one repetition.
Lean Body Mass Calculator Estimate lean body mass from weight and body fat.
Countdown Timer Use a countdown timer for intervals.
HIIT Timer Interval training timer.
Sample HIIT Workout Try a pre made HIIT session.
Stopwatch Straightforward stopwatch with milliseconds.
Advanced Protein Calculator Daily protein and amino acid targets.