Health & Fitness Tools
Free informational calculators for BMI, body fat percentage, BMR, TDEE, calories, macros, hydration, running pace, cycling speed, heart rate zones, and 1RM strength. All tools run 100% in your browser with zero server uploads and instant processing.
BMI Calculator
Calculate Body Mass Index using WHO classification, Oxford formula, and BMI Prime
Body Fat Calculator
Estimate body fat percentage and lean muscle mass using US Navy tape circumference
Ideal Body Weight Calculator
Compare ideal body weight across Devine, Robinson, Miller, and Hamwi medical formulas
Water Intake Calculator
Calculate daily hydration requirements based on weight, exercise, and climate
BMR Calculator
Calculate Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle
TDEE Calculator
Calculate Total Daily Energy Expenditure based on physical activity multipliers
Calorie Deficit & Surplus Calculator
Plan daily calorie targets for mild, standard, or aggressive weight loss and lean bulking
Macro Calculator
Calculate daily protein, carbohydrate, and fat gram targets for fitness goals
Pace Calculator
Universal pace and speed converter between min/km, min/mile, km/h, and mph
Running Pace & Race Time Predictor
Predict 5K, 10K, Half Marathon, and Marathon race finish times using Riegel formula
Running Speed & Treadmill Incline Calculator
Convert treadmill speed, pace, and calculate VO2 aerobic cost of incline gradient
Cycling Speed & Gear Ratio Calculator
Calculate cycling speed based on cadence, chainring, cog, and tire circumference
Target Heart Rate Zone Calculator
Calculate 5 training heart rate zones using Karvonen HRR and Tanaka HRmax
One Rep Max (1RM) Calculator
Calculate 1RM strength and percentage training load table across 7 clinical formulas
Protein Calculator
Calculate daily protein requirements for muscle growth, cutting, and endurance
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