How to use · 57 of 57 tools
Calculator guides
Every guide walks the calculator's actual inputs, shows what each output means, and includes a worked example. Formulas are sourced (Mifflin-St Jeor, Epley/Brzycki, Riegel, Karvonen). No transformation promises, no plans, no protocols.
Calories, macros, fueling
Nutrition 10
5 STEPS
How to Use BMR Calculator
Estimate your baseline calorie needs with our BMR calculator. Learn to accurately input data, interpret results, and plan weight loss, gain.
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5 STEPS
How to Use Creatine Intake Calculator
Optimize your creatine supplementation with our intake calculator. Learn to determine personalized loading and maintenance dosages based on your body.
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5 STEPS
How to Use Food-to-Exercise Converter
Convert food calories into equivalent exercise minutes. Understand the physical effort needed to burn off your meals and snacks, supporting smarter.
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4 STEPS
How to Use Hybrid Athlete Macro Split
Step-by-step guide for the Hybrid Athlete Macro Split: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Intermittent Fasting Window Planner
Plan your ideal intermittent fasting schedule with our easy-to-use calculator. Find your perfect eating and fasting windows based on your lifestyle.
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5 STEPS
How to Use Macro Calculator
Calculate your macro targets with our Macro Calculator. Customize your protein, carb, and fat intake for weight loss, muscle gain, or maintenance.
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5 STEPS
How to Use Macro Cycling Calculator
Calculate different macronutrient targets for training and rest days with carb cycling strategies for recomposition, lean bulk, or cut phases.
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5 STEPS
How to Use Protein Intake Calculator
Estimate your daily protein target with our guide. Learn how to use the Protein Intake Calculator to meet your training goals, whether for muscle gain.
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5 STEPS
How to Use TDEE Calculator
Estimate your daily calorie needs with our TDEE Calculator guide. Learn how to accurately calculate Total Daily Energy Expenditure to achieve weight loss.
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5 STEPS
How to Use Water Intake Calculator
Estimate optimal hydration with the AI Fit Hub Water Intake Calculator. Personalize your daily water needs based on activity, climate, and body weight.
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Lifting, 1RM, programming
Strength 13
5 STEPS
How to Use DOTS & Wilks Score Calculator
How to use DOTS & Wilks score calculator: normalize powerlifting performance across bodyweights with the DOTS & Wilks Score Calculator. ranking.
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5 STEPS
How to Use DOTS vs Wilks vs GL Calculator
Compare your powerlifting total across DOTS, Wilks, and Goodlift scoring systems to see which formula rates your performance highest.
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5 STEPS
How to Use Meet Day Attempt Selector
Plan your powerlifting meet attempts with calculated opener, second, and third attempt weights based on recent training maxes and confidence levels.
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5 STEPS
How to Use One-Rep Max Calculator
Estimate your true one-rep max safely for any lift using our calculator. Optimize training programs, track strength progress, and set new personal records.
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5 STEPS
How to Use Plate Loading Calculator
Optimize your barbell lifts with precise plate loading. This guide helps powerlifters, bodybuilders, and gym-goers efficiently calculate plate.
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5 STEPS
How to Use Progressive Overload Planner
How to use Progressive Overload planner: optimize your strength training with the AI Fit Hub Progressive Overload Planner.
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5 STEPS
How to Use RPE to Percentage Converter
Convert RPE ratings and rep counts to percentage of one-rep max using the Tuchscherer RPE table for autoregulated training.
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4 STEPS
How to Use Smolov / Sheiko / Texas Method Cycles
Step-by-step guide for the Smolov / Sheiko / Texas Method Cycles: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Strength Percentile Calculator
How to use strength Percentile calculator: find where your squat, bench press, deadlift, or overhead press ranks compared to other lifters at your bodyweight.
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6 STEPS
How to Use Strength Standards Calculator
Assess your current strength levels and set realistic lifting goals with the Strength Standards Calculator. Compare your performance to established.
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4 STEPS
How to Use Velocity-Based 1RM Estimator
Step-by-step guide for the Velocity-Based 1RM Estimator: inputs, interpretation, and reproducibility tips.
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4 STEPS
How to Use Wendler 5/3/1 Planner
Step-by-step guide for the Wendler 5/3/1 Planner: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Workout Volume Calculator
How to use workout volume calculator: optimize your training for muscle growth and recovery with our Workout Volume Calculator.
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Pace, zones, endurance
Cardio 13
5 STEPS
How to Use Calories Burned Calculator
Optimize your workouts! Calculate calories burned for any activity. Learn how to use our tool, understand your energy expenditure, and effectively manage.
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5 STEPS
How to Use Cycling Power & FTP Zone Calculator
Optimize your cycling training! Learn to use the AI Fit Hub's Cycling Power & FTP Zone Calculator to set personalized power zones for endurance, tempo.
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4 STEPS
How to Use Marathon Pace + Elevation Calculator
Step-by-step guide for the Marathon Pace + Elevation Calculator: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Race Time Predictor
Race time predictor guide: input a recent result and project finish times across 5K, 10K, half, and marathon. Set realistic goals and pace your training.
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3 STEPS
How to Use Resting Heart Rate Calculator
Learn to use the AI Fit Hub Resting Heart Rate Calculator to assess your cardiovascular health. Understand what your RHR means for fitness and overall.
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3 STEPS
How to Use Run Training Paces Calculator
Calculate your training paces with the Run Training Paces Calculator. Accurately set your easy, tempo, interval, and long run paces for effective training.
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5 STEPS
How to Use Running Pace Calculator
Plan your runs with the AI Fit Hub Running Pace Calculator. Input distance and time, calculate your average pace, and predict race times or distances.
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4 STEPS
How to Use Sweat-Rate + Electrolyte Marathon Plan
Step-by-step guide for the Sweat-Rate + Electrolyte Marathon Plan: inputs, interpretation, and reproducibility tips.
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6 STEPS
How to Use Swim Pace Calculator
Optimize your swim training! Learn how to use the AI Fit Hub Swim Pace Calculator to set goals, track progress, and improve speed for competitive.
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5 STEPS
How to Use Treadmill Pace Converter
Easily convert treadmill speeds and inclines into equivalent outdoor running paces, or plan your indoor workouts based on outdoor goals. Optimize.
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5 STEPS
How to Use VO2 Max Estimator
Estimate your VO2 max with the VO2 Max Estimator. Learn how to assess endurance, track progress, and tune your training for better health and performance.
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4 STEPS
How to Use Walking Calorie Calculator
Estimate calories burned while walking using the AI Fit Hub Walking Calorie Calculator. Learn how to interpret the result and align it with your weight.
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5 STEPS
How to Use Zone 2 Heart Rate Calculator
Calculate your Zone 2 heart rate range using Maffetone, Karvonen, and percentage-based methods to optimize aerobic base training.
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Body-fat, lean mass, BMI
Body Composition 9
5 STEPS
How to Use BMI Calculator
Learn to accurately use the BMI Calculator to assess your weight status. Understand inputs, interpret results, and get practical health insights.
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5 STEPS
How to Use Body Fat Percentage Calculator
Get accurate body composition insights with our guide to the Body Fat Percentage Calculator. Learn what it does, who benefits, and how to interpret.
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4 STEPS
How to Use Female Athlete Formula Suite
Step-by-step guide for the Female Athlete Formula Suite: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use FFMI Calculator
Estimate your muscle-building ceiling with the FFMI Calculator. Learn how to accurately input your data, understand your muscularity, and benchmark.
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5 STEPS
How to Use Flexibility Score Calculator
Assess your range of motion with the AI Fit Hub Flexibility Score Calculator. Identify stiff areas and track progress for improved mobility and injury.
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5 STEPS
How to Use Ideal Weight Calculator
Discover your healthy weight range with our Ideal Weight Calculator. Input your details to understand personalized targets for optimal health and fitness.
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5 STEPS
How to Use Lean Body Mass Calculator
Calculate your lean body mass with our guide. Learn how to use the LBM calculator to track progress, optimize training, and set realistic body composition.
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5 STEPS
How to Use Muscle Gain Potential Calculator
How to use muscle gain Potential calculator: estimate your natural muscular potential using the Casey Butt model and see how close you are to your genetic cei.
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5 STEPS
How to Use Waist-to-Hip Ratio Calculator
Assess health risk using the Waist-to-Hip Ratio Calculator. Learn how to accurately measure, interpret results, and understand your body fat distribution.
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Sleep, HRV, deload
Recovery 5
5 STEPS
How to Use Heart Rate Zone Calculator
Optimize your workouts by learning how to use the Heart Rate Zone Calculator. Personalize training intensity for weight loss, endurance, or general.
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4 STEPS
How to Use HRV Deload Trigger
Step-by-step guide for the HRV Deload Trigger: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Sleep Calculator
Optimize your sleep and wake up refreshed! Learn how to use the AI Fit Hub Sleep Calculator to find ideal bedtimes and wake-up times based on sleep cycles.
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5 STEPS
How to Use Sleep Debt Calculator
Track seven nights of sleep to calculate accumulated sleep debt with a personalized recovery timeline and sleep quality assessment.
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5 STEPS
How to Use Sweat Rate Calculator
How to use Sweat rate calculator: optimize your hydration strategy. This guide shows how to use the AI Fit Hub Sweat Rate Calculator to understand your fluid.
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Deficits, timelines, taper
Planning 7
5 STEPS
How to Use Body Recomposition Planner
Plan your body recomposition with our calculator. Learn how to strategically lose fat while building muscle with personalized calorie and macro targets.
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5 STEPS
How to Use Calorie Deficit Calculator
Plan sustainable weight loss with AI Fit Hub's Calorie Deficit Calculator. Accurately determine your daily calorie needs for effective fat loss without.
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4 STEPS
How to Use Concurrent Training Interference Estimator
Step-by-step guide for the Concurrent Training Interference Estimator: inputs, interpretation, and reproducibility tips.
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4 STEPS
How to Use Detraining Decay Estimator
Step-by-step guide for the Detraining Decay Estimator: inputs, interpretation, and reproducibility tips.
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5 STEPS
How to Use Hybrid Training Planner
How to use Hybrid training planner: build a weekly training schedule that balances running and lifting with interference effect warnings and recovery manageme.
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4 STEPS
How to Use Junk Volume Detector
Step-by-step guide for the Junk Volume Detector: inputs, interpretation, and reproducibility tips.
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4 STEPS
How to Use Race-Week Taper Planner
Step-by-step guide for the Race-Week Taper Planner: inputs, interpretation, and reproducibility tips.
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Adjacent surfaces