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Health & Fitness Tools

900+ free calculators, planners, and assessment tools.

All (900) Biomarkers (63) Body (39) Cardio (94) Nutrition (138) Psychology (51) Recovery (175) Strength (60) Supplements (52) Training (228)

900 tools

TDEE Calculator

Calculate your Total Daily Energy Expenditure based on activity level, age, weight, and goals.

Macro Calculator

Get your optimal protein, carb, and fat targets based on your goals — cut, maintain, or bulk.

One-Rep Max Calculator

Estimate your 1RM from any rep range using multiple validated formulas.

Body Fat % Estimator

Estimate body fat percentage using the Navy method from simple measurements.

Water Intake Calculator

Find your optimal daily water intake based on weight, activity, and climate.

Sleep Cycle Calculator

Find the best bedtime or wake time aligned with 90-minute sleep cycles.

Heart Rate Zone Calculator

Calculate your 5 training heart rate zones using Karvonen or percentage method.

Wilks / DOTS Score

Compare your powerlifting total across weight classes with Wilks and DOTS.

Protein Timing Planner

Plan optimal protein distribution across meals to maximize MPS.

VO2 Max Estimator

Estimate your VO2 max from a timed run or resting heart rate.

Calculate Body Mass Index and see where you fall on the classification scale.

Calculate your Basal Metabolic Rate — calories burned at complete rest.

Ideal Weight Calculator

Find your ideal weight range using Devine, Robinson, Miller, and Hamwi formulas.

Waist-to-Hip Ratio

Assess cardiovascular and metabolic risk from your waist-to-hip ratio.

Calories Burned

Estimate calories burned during any activity using MET values.

Running Pace Calculator

Convert between pace, speed, and finish time for any running distance.

Max Heart Rate Calculator

Estimate your maximum heart rate using 6 validated scientific formulas.

Body Type Assessment

Determine your somatotype tendency based on body measurements and traits.

Lean Body Mass Calculator

Calculate your lean body mass and skeletal muscle mass estimate.

FFMI Calculator

Calculate Fat-Free Mass Index to assess muscularity relative to height.

Calorie Deficit Planner

Plan your weekly deficit and predict weight loss timeline.

Daily Fiber Calculator

Find your recommended daily fiber intake and track common food sources.

Caffeine Calculator

Calculate safe caffeine limits and optimal timing for performance.

Alcohol Calorie Calculator

See the hidden calories in alcoholic drinks and their recovery impact.

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Blog & Articles

35 articles across 7 categories — health news, deep dives, workout science, nutrition, and more.

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Guides & Challenges

20 evidence-based guides, 5 challenges, and 5 value bundles — complete with PDFs, Excel trackers, and protocols.

🔥 Fat Loss 💪 Muscle 🧠 Sleep 🌱 Nutrition

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