Fitness Calculators
205+ precision tools built by certified trainers, sports scientists, and registered dietitians. Every formula cited. Every result actionable. No email walls. No paywalls. Just the math that drives real results.
Nutrition Calculators
Dial in your nutrition with laboratory-grade precision. These calculators use the Mifflin-St Jeor, Katch-McArdle, and Harris-Benedict equations trusted by registered dietitians and sports nutritionists worldwide. Whether you are cutting, bulking, or maintaining, the difference between results and spinning your wheels comes down to the numbers.
Macros Calculator: Count Your Macronutrient Easily
Use CalculatorProtein Calculator: Find Your Daily Protein Intake
Use CalculatorCalorie Deficit Calculator
Use CalculatorCalorie Calculator: Find Your Daily Calorie Intake for Reaching Your Ideal Weight
Use CalculatorHow Many Calories To Eat Per Day Calculator
Use CalculatorCalories Per Meal Calculator: Find Calorie Breakdown Per Meal
Use CalculatorCarbohydrate Calculator: Carb Intake Recommendations
Use CalculatorFat Intake Calculator
Use CalculatorFiber Calculator: Find Your Daily Fiber Intake
Use CalculatorWater Intake Calculator
Use CalculatorCreatine Calculator: Find Your Daily Creatine Intake
Use CalculatorAdvanced Net Carb Calculator for Keto, Low-Carb & Diabetic Diets
Use CalculatorNutrient Timing Calculator
Use CalculatorCalories Per Gram Calculator
Use CalculatorCalorie Density Calculator
Use CalculatorCaffeine Calculator – Are You Consuming Too Much?
Use CalculatorMelatonin Dosage Calculator
Use CalculatorStrength & Performance Calculators
From your first rep to your competition peak, these tools quantify where you stand. Built on the Epley, Brzycki, and Lombardi formulas validated across thousands of lifters. Used by powerlifters, strength coaches, and competitive athletes to plan training cycles and peak for meets.
One Rep Max Calculator (One-RM Calculator)
Use CalculatorStrength Standards – How Strong Are You?
Use CalculatorHow to Calculate Your Bench Press 1RM
Use CalculatorSquat Max Calculator: One Rep Max Squat
Use CalculatorMax Deadlift Calculator — Calculate Your One Rep Max Deadlift
Use CalculatorWilks Calculator: Wilks Score Calculator in LBs And KGs
Use CalculatorOne Rep Max Triceps Dips Calculator
Use CalculatorOne Rep Max Weighted Muscle-Ups Calculator
Use CalculatorOne Rep Max Weighted Pull Ups Calculator
Use CalculatorRep Range Calculator
Use CalculatorOptimal Rest Time Calculator
Use CalculatorSinclair Calculator: Calculate Sinclair Total Points
Use CalculatorBody Composition Calculators
The scale lies. These tools look past the number to what actually matters: lean mass, fat distribution, bone structure, and how your body compares to validated health benchmarks. Used by personal trainers, physique coaches, and medical professionals for accurate body composition assessment.
Body Fat Calculator: Find Your Body Fat Percentage
Use CalculatorBody Fat US Navy Calculator
Use CalculatorBody Fat YMCA Calculator
Use CalculatorBody Fat Skinfold Calculator
Use Calculator3 Skinfold Body Fat Calculator
Use Calculator4 Skinfold Body Fat Calculator
Use Calculator7 Skinfold Body Fat Calculator
Use CalculatorBMI (Body Mass Index) Calculator | Quetelet Index Calculator
Use CalculatorReverse BMI Calculator
Use CalculatorIdeal Body Weight Calculator
Use CalculatorLean Body Mass (LBM) Calculator
Use CalculatorFFMI Calculator: Find Your Fat Free Mass Index
Use CalculatorBody Surface Area Calculator
Use CalculatorBody Type Quiz: Discover Your Unique Somatotype – Endomorph, Ectomorph, or Mesomorph?
Use CalculatorGolden Ratio Face: Find Golden Face Ratio
Use CalculatorGrecian Ideal Calculator: Ideal Body Measurements
Use CalculatorShoulder to Waist Ratio Calculator – The V-Taper Math
Use CalculatorWaist to Height Ratio Calculator
Use CalculatorThe Ponderal Index (PI) Calculator: Height vs. Weight
Use CalculatorRelative Fat Mass (RFM) Calculator
Use CalculatorTotal Body Water (TBW) Calculator
Use CalculatorBody Recomposition Calculator
Use CalculatorMetabolic Rate & Energy Calculators
Your metabolism is not a fixed number. These tools calculate your daily energy expenditure using the formulas that registered dietitians and endocrinologists actually trust. Understand your burn rate, and every other nutrition decision falls into place.
TDEE Calculator: Find TDEE, Macros, BMI, BMR & Ideal Weight
Use CalculatorBMR Calculator: Find Your Basal Metabolic Rate
Use CalculatorRMR Calculator: Find Your Resting Metabolic Rate
Use CalculatorAMC (Actual Metabolic Rate) Calculator
Use CalculatorAMR (Active Metabolic Rate) Calculator
Use CalculatorEER Calculator – Estimated Energy Requirement Calculator
Use CalculatorMetabolic Age Calculator: Discover Your Body’s True Biological Clock
Use CalculatorWeight Management Calculators
The best diet is the one you can sustain. These tools help you set realistic targets, calculate sustainable deficits, and plan your path to your goal weight. No crash diets, no magic numbers, just evidence-based planning.
Weight Loss Calculator
Use CalculatorWeight Gain Calculator – The Bulking Calculator
Use CalculatorWeight Loss Percentage Calculator
Use CalculatorWeight Loss Target Date Calculator
Use CalculatorCarb Cycling Calculator: Supercharge Your Fat Loss
Use CalculatorReverse Dieting Calculator
Use CalculatorLeangains Calculator for Lean Bulk or Cutting
Use CalculatorKeto Calculator – The BEST Ketogenic Calculator For Your Macros
Use CalculatorFasting Calculators
Fasting is not just skipping meals. These precision tools model the metabolic shifts that happen hour by hour: glycogen depletion, ketone production, autophagy activation, and growth hormone response. Built on clinical research from the New England Journal of Medicine and Cell Metabolism.
Intermittent Fasting Calculator
Use CalculatorAutophagy Calculator – When Does Autophagy Start?
Use CalculatorIntermittent Fasting Weight Loss Calculator: Discover How Much You Can Lose
Use CalculatorWater Fasting Weight Loss Calculator
Use CalculatorDry Fasting Calculator: Estimate Your Weight Loss & Safety Risks
Use CalculatorExtended Fasting Calculator (24-72+ Hours)
Use CalculatorFasting Age Calculator – Biological Age Impact
Use CalculatorWhat Breaks a Fast? – Complete Food & Drink Guide
Use CalculatorInflammation Calculator & Personalized Action Plan
Use CalculatorProtein Calculators
Protein is the most important macronutrient for body composition. These calculators help you hit your targets whether you eat meat, fish, eggs, or follow a fully plant-based diet. Source-specific tools show exactly how much whole food you need.
Protein Calculator: Find Your Daily Protein Intake
Use CalculatorVegan Protein Calculator: Discover Your Optimal Daily Protein Goals
Use CalculatorProtein Absorption Calculator: How Fast Does Your Body Digest Protein?
Use CalculatorBeef Protein Calculator
Use CalculatorChicken Protein Calculator
Use CalculatorEgg Protein Calculator
Use CalculatorFish Protein Calculator
Use CalculatorProtein Shake Calculator
Use CalculatorCalories Burned Calculators
Stop guessing, start measuring. These calculators use MET values from the Compendium of Physical Activities (Ainsworth et al.) to give you accurate calorie burn estimates for any exercise, duration, and intensity level. Over 60 activities covered.
Calories Burned Calculator By Exercises, Select Over 250 Exercises!
Use CalculatorCalorie Burning Calculator
Use CalculatorCalories Burned Running Calculator
Use CalculatorCalories Burned Walking Calculator: Find Calorie Burn from Walking?
Use CalculatorCalories Burned Swimming Calculator
Use CalculatorCalories Burned Biking Calculator [BEST]
Use CalculatorCalories Burned Hiking Calculator
Use CalculatorCalories Burned Jumping Rope Calculator
Use CalculatorElliptical Calorie Calculator: Calories Burned on Elliptical Machine
Use CalculatorCalories Burned Weight Lifting & Bodyweight Exercise Calculator
Use CalculatorTreadmill Calorie Calculator
Use CalculatorCalories Burned Spinning Calculator
Use CalculatorCalories Burned Sleeping Calculator
Use CalculatorCalories Burned Sitting Calculator
Use CalculatorCalories Burned Standing Calculator
Use CalculatorCalories Burned While Resting and Doing Nothing Calculator
Use CalculatorSitting vs. Standing Calories Burned Calculator
Use CalculatorSteps to Calories Calculator
Use CalculatorHeart Rate Based Calorie Burn Calculator
Use CalculatorTime To Burn Calories Eaten Calculator
Use CalculatorCalories Burned Rowing Calculator
Use CalculatorCalories Burned Pilates Calculator
Use CalculatorCalories Burned Boxing Calculator
Use CalculatorCalories Burned Dancing Calculator
Use CalculatorCalories Burned Skiing Calculator
Use CalculatorCalories Burned Skateboarding Calculator
Use CalculatorCalories Burned Skating Calculator
Use CalculatorCalories Burned Rollerblading Calculator
Use CalculatorCalories Burned on a Trampoline Calculator
Use CalculatorCalories Burned Stretching Calculator
Use CalculatorCalories Burned Gardening Calculator
Use CalculatorCalories Burned While Raking Calculator
Use CalculatorCalories Burned Shoveling Snow Calculator
Use CalculatorCalories Burned Doing Laundry Calculator
Use CalculatorCalories Burned From Stairs Calculator
Use CalculatorCalories Burned Surfing Calculator
Use CalculatorCalories Burned Kayaking Calculator
Use CalculatorHow Many Calories Do You Burn Rock Climbing?
Use CalculatorBackpacking Calculator – How Many Calories Do I Burn Backpacking?
Use CalculatorCalories Burned from Tai Chi Calculator
Use CalculatorMartial Arts Calories Burned Calculator
Use CalculatorCalories Burned From Archery Calculator
Use CalculatorCalories Burned from Gymnastics Calculator
Use CalculatorCalories Burned from Meditating Calculator
Use CalculatorCalories Burned Hunting Calculator
Use CalculatorCalories Burned Juggling Calculator
Use CalculatorCalories Burned Shopping Calculator
Use CalculatorCalories Burned Chopping Wood Calculator
Use CalculatorCalories Burned Painting (Painting Room, Walls and Fence) Calculator
Use CalculatorHow Many Calories Do You Burn Fishing?
Use CalculatorHow Many Calories Do You Burn Riding a Horse?
Use CalculatorCalories Burned Skydiving Calculator
Use CalculatorCalories Burned Snowshoeing Calculator
Use CalculatorCalories Burned Water Walking Calculator
Use CalculatorCalories Burned Using Kettlebell Training Calculator
Use CalculatorCalories Burned Wrestling Calculator
Use CalculatorHow Many Calories Does CrossFit Burn?
Use CalculatorHow Many Calories Does Mowing the Lawn Burn?
Use CalculatorHow Many Calories Do You Burn With Bootcamp?
Use CalculatorCalories Burned Calisthenics Calculator
Use CalculatorCalories Burned Deadlift Calculator
Use CalculatorCalories Burned Playing Badminton Calculator
Use CalculatorCalories Burned Playing Football Calculator
Use CalculatorCalories Burned Playing Golf Calculator
Use CalculatorCalories Burned Playing Hockey Calculator
Use CalculatorCalories Burned Playing Lacrosse Calculator
Use CalculatorCalories Burned Playing Racquetball Calculator
Use CalculatorCalories Burned Playing Rugby Calculator
Use CalculatorCalories Burned Playing Soccer Calculator
Use CalculatorCalories Burned Playing Squash Calculator
Use CalculatorCalories Burned Playing Table Tennis Calculator
Use CalculatorCalories Burned Playing Tennis Calculator
Use CalculatorCalories Burned Playing Track and Field Calculator
Use CalculatorCalories Burned Playing Video Games Calculator
Use CalculatorCalories Burned Playing Volleyball Calculator
Use CalculatorPush Up Calories Calculator: Find The Calories Burned Doing Push-Ups
Use CalculatorCalories Burned Squats Calculator
Use CalculatorHow Many Calories Do You Burn Doing Jumping Jacks?
Use CalculatorHow Many Calories Do You Burn Doing Lunges?
Use CalculatorHow Many Calories Do You Burn Doing Burpees?
Use CalculatorHow Many Calories Do You Burn Doing Sit-ups?
Use CalculatorHow Many Calories Do You Burn Doing Ab Exercises?
Use CalculatorHow Many Calories Do You Burn Doing Ab Roller?
Use CalculatorHow Many Calories Do You Burn Doing Bicycle Crunches?
Use CalculatorHow Many Calories Do You Burn Doing Crunches?
Use CalculatorHow Many Calories Do You Burn Doing Hanging Knee Tucks?
Use CalculatorHow Many Calories Do You Burn Doing Side Crunches?
Use CalculatorHow Many Calories Do You Burn Doing Side Planks?
Use CalculatorHow Many Calories Do You Burn With Reverse Crunches?
Use CalculatorHow Many Calories Do You Burn By Doing Bridges (Butt Lift)?
Use CalculatorHow Many Calories Do You Burn Doing Aerobics?
Use CalculatorHow Many Calories Do You Burn Doing Aqua Aerobics?
Use CalculatorHow Many Calories Do You Burn Doing Circuit Training?
Use CalculatorYoga Calories Burned Calculator
Use CalculatorZumba Calories Burned Calculator
Use CalculatorRunning & Cardio Calculators
Whether you are chasing a Boston qualifier or starting your first Couch to 5K, these tools turn data into speed. Race pace projections, VO2max estimates, and treadmill conversions used by running coaches and endurance athletes at every level.
Running Calculator: Running Pace Calculator
Use CalculatorRace Time Predictor Calculator
Use CalculatorTreadmill Pace Calculator & Conversion Charts for Effective Indoor Running
Use CalculatorTreadmill Calorie Calculator
Use CalculatorVO2 Max Calculator: Estimate Maximum Volume of Oxygen
Use CalculatorSteps to Miles Calculator
Use CalculatorHow Long To Walk A Mile Calculator
Use CalculatorRunning Cadence Calculator | Optimize Your Running Efficiency [UPDATED]
Use CalculatorHeart Rate & Cardiovascular
Heart rate training is the bridge between effort and adaptation. These calculators use the Karvonen method and age-predicted max heart rate models to define your training zones. Train in the right zone and every minute counts.
Fitness Tests & Assessments
Measure what matters. These assessment tools evaluate your real-world fitness across strength, endurance, flexibility, and body composition. Used by military fitness programs, personal trainers, and athletes who want an honest baseline.
Fitness Age Calculator: Accurately Estimate Your Physical Fitness Level
Use CalculatorMetabolic Age Calculator: Discover Your Body’s True Biological Clock
Use CalculatorArmy Physical Fitness Test (APFT) Calculator
Use CalculatorNavy Physical Readiness Test (PRT) Calculator
Use Calculator6 Minute Walk Test (6MWT) Calculator
Use CalculatorElderly Mobility Scale (EMS) Calculator
Use CalculatorSit-Ups Test Calculator: Testing Your Fitness at Home or Gym
Use CalculatorFood & Restaurant Calculators
Make smarter choices when eating out or building your weekly meal plan. These tools give you the real nutritional numbers for popular chains and home-cooked meals.
More Calculators
Explore our full collection of fitness, health, and nutrition calculators. New tools are added regularly based on the latest exercise science research and user requests.
5:2 Diet Calculator – Fast Day Calories
Use CalculatorFasting Electrolyte Calculator – Sodium, Potassium, Magnesium
Use CalculatorFasting Progress Tracker – Track Your Journey
Use CalculatorFasting Protocol Comparison – Find Your Best Method
Use CalculatorFasting Schedule Generator – Build Your Plan
Use CalculatorIF Macro Calculator – Intermittent Fasting Macros
Use CalculatorKetosis Calculator – When Do You Enter Ketosis?
Use CalculatorLive Fasting Timer – Track Your Fast in Real Time
Use CalculatorMetabolic Switching Calculator – Fat Burning Timeline
Use CalculatorOMAD Calculator – One Meal a Day Calories & Macros
Use CalculatorFrequently Asked Questions
How accurate are online fitness calculators?
The calculators on FitnessVolt use peer-reviewed formulas (Mifflin-St Jeor, Epley, Karvonen, U.S. Navy method) that have been validated in clinical and sports science research. They provide estimates within 5-10% of lab-measured values for most people. For the highest accuracy, we recommend using multiple calculators and averaging the results, then adjusting based on real-world outcomes over 2-4 weeks.
Which calculator should I start with?
Start with the TDEE Calculator to establish your daily calorie needs, then use the Macros Calculator to set your protein, carb, and fat targets. If you are training for strength, add the One Rep Max Calculator to baseline your lifts. These three numbers form the foundation of any effective program.
Do I need to create an account to use these calculators?
No. Every calculator on FitnessVolt is 100% free with no account required, no email gates, and no usage limits. We believe fitness tools should be accessible to everyone.
How often should I recalculate my TDEE and macros?
Recalculate every 4-6 weeks, or whenever your weight changes by more than 5 pounds, your activity level shifts significantly, or you change training programs. Your metabolism adapts to sustained calorie deficits (metabolic adaptation), so periodic recalculation ensures your nutrition stays aligned with your current physiology.
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor that accounts for exercise, daily movement, and the thermic effect of food. TDEE is the number you should use for nutrition planning.
Can I use these calculators if I am a beginner?
Absolutely. The strength standards calculators classify lifters from Beginner through Elite, so they work at every level. Beginners benefit the most from baseline testing because it gives you clear, measurable targets to work toward.