Health & Fitness Calculators
Select from our suite of free, accurate tools to calculate calories burned during activities, track your macros, or find your daily energy expenditure.
Activity Burn Calculators
Running
Moderate pace (6mph)
Jogging
Light pace (5mph)
Sprinting
Fast pace (8mph)
Walking
Brisk pace (3.5mph)
Hiking
Cross-country
Cycling
Moderate pace (12mph)
Stationary Biking
Moderate effort
Swimming
Laps/Freestyle
Jump Rope
Moderate pace
Weightlifting
General/Strength training
HIIT / Circuit Training
High-intensity interval training
Yoga
Hatha/Restorative
Pilates
General Pilates
Elliptical Trainer
Moderate effort
Rowing Machine
Moderate effort
Stair Master / Climbing
General climbing
Basketball
Game/Practice
Soccer
General Game
Treadmill
Adjustable incline and speed
Rucking
Weighted walking over varied terrain
Diet, Macros & Weight Loss
TDEE Calculator
Calculate your Total Daily Energy Expenditure and get optimal macros.
Macro Calculator
Find the perfect split of protein, carbs, and fat.
Daily Fiber Calculator
Calculate your exact daily fiber target based on the clinical 14g/1000kcal rule. Includes gut adaptation protocol.
Calorie Deficit Calculator
Calculate your required deficit and exact timeline for weight loss.
Protein Calculator
Calculate your exact daily protein target based on your goals.
Intermittent Fasting Calculator
Calculate your fasting schedule, eating window, and exact macronutrient targets.
Carb Loading Calculator
Calculate glycogen supercompensation, exact macro targets, and water weight.
Fat Intake Calculator
Calculate exact daily fat grams tailored for keto, low-fat, and balanced diets.
Keto Macro Calculator
Calculate accurate macros to guarantee ketosis while preserving lean muscle mass.
Meal Macro & TEF
Interactive meal builder with live food database search. Calculate total macros, net absorbed calories (TEF), and volumetric satiety.
Body Composition & General Health
BMI Calculator
Check your Body Mass Index quickly.
BMR Calculator
Find your Basal Metabolic Rate (BMR).
Waist to Hip Ratio
Calculate your WHR, classify your body shape (Apple vs. Pear), and get exact waist reduction targets to lower health risks.
Body Fat Calculator
Calculate your true body fat percentage using the US Navy Method.
Water Intake Calculator
Calculate your daily hydration target adjusted for food intake.
Ideal Body Weight Calculator
Find your IBW and AdjBW based on your height and bone frame size.
Lean Body Mass Calculator
Calculate your LBM, find your FFMI score, and get personalized protein targets.
Sleep Cycle Calculator
Calculate exact bedtime and wake-up times to stop morning grogginess.
FFMI Calculator (Fat-Free Mass Index)
Discover your natural genetic muscle potential and expose the flaws of BMI.
Running & Endurance
Age Grade Calculator
Calculate your WMA age-grade percentage and find out how your time compares across ages.
Treadmill Pace Converter
Convert treadmill speed to outdoor running pace, adjust for incline effort, and project your race finish times.
Couch to 5K Schedule
Generate a custom, date-synced C25K plan that perfectly adapts to your current fitness level and actual jogging pace.
Couch to 10K Schedule
Generate a custom, date-synced 10K plan tailored for total beginners or runners utilizing a 5K-to-10K bridge.
Sweat Rate Calculator
Calculate your exact hourly sweat loss, estimated sodium depletion, and safe race-day fluid target to prevent hyponatremia.
Pace Calculator
Calculate running pace, finish time, and treadmill speed.
Heart Rate Zone Calculator
Find your exact 5 training zones using the Karvonen method.
VO2 Max Calculator
Measure your cardiovascular fitness using 3 validated clinical tests.
Race Time Predictor
Get a highly accurate race time prediction and required pacing splits.
Track Event Predictor
Predict race times using modified Riegel math and generate exact 400m lap splits for your target distance.
Strength, Athletics & Military
Creatine Dosage
Find your exact creatine loading and maintenance doses based on official clinical guidelines.
One Rep Max (1RM) Calculator
Calculate your 1RM accurately and get a free training zone percentage table.
Army Body Fat Calculator (AR 600-9)
Official 2023 US Army one-site tape test and ACFT exemption standards.
DOTS & Wilks Score
Calculate your powerlifting score, discover your competitive tier, and generate exact strength targets to level up.
ACFT Score
Official Army Combat Fitness Test grader. Get exact scoring, alternate cardio Go/No-Go results, and weak-link diagnostics.
Cycling W/kg
Calculate your power-to-weight ratio, map your FTP to racing tiers, and generate precise goals for climbs.
Gear & Pets
Shoe Lifespan Calculator
Calculate the exact replacement date for your running shoes based on weekly mileage, runner weight, and foam type.
Shoe Size Calculator
Calculate your exact US, UK, and EU shoe size. Factors in foot width, gender, swelling, and athletic toe splay.
Dog Calorie Calculator
Accurate canine calorie math (RER & MER), safe weight loss targets, and a built-in cups-per-day kibble converter.
Cat Calorie Calculator
Accurate feline calorie math (RER & MER), safe weight loss targets, and a built-in wet/dry food portion converter.
Steps & Distance Converters
Km to Miles Converter
Instant kilometer to mile conversions, 400m track lap calculations, and quick race distance references.
Miles to Km Converter
Instant mile to kilometer conversions, exact track math for international racing, and pace translations.
Steps to Miles Converter
Accurate steps-to-miles conversion based on height, gender, and stride length, plus calorie burn.
Miles to Steps Converter
Goal planner and distance converter. Calculate exact steps needed to cover a distance, or miles required to close your rings.
Steps to Km Converter
Accurate steps-to-kilometers conversion based on height, walking vs. running stride lengths, and WHO active minutes.
Km to Steps Converter
Metric goal planner. Calculate exact steps needed to cover a kilometer distance, or kilometers required to close your rings.
Steps to Calories
Convert step counts into accurate metabolic burn data. Calculate both Gross and true Net active calories.
Calories to Steps
Translate calorie burn goals and junk food treats into exact step counts, walking distance, and time required.
Energy & Physics Converters
Kcal to Calories
Convert between kilocalories, Dietary Calories, and small physics calories. End smartwatch confusion.
kJ to Calories
Instantly convert Kilojoules to US Calories. Perfect for translating European and Australian food labels.
Calories to kJ
Translate American food labels and fitness trackers into Kilojoules. Features a dynamic Metric Macro engine.
Calories to Joules
Translate dietary calories into mechanical Watts for cycling, rowing, and endurance physics.
Joules to Calories
Convert mechanical work from a cycling power meter or rowing ergometer into true dietary calories burned.
Calories to Kcal
A thermodynamics energy converter separating small physics calories from kilocalories (kcal) for laboratory students.