Health & Fitness Calculators
Scientifically verified health tools for BMI, BMR, calorie needs, body fat percentage, and ideal weight.
BMI Calculator
Calculate Body Mass Index (BMI) and healthy weight category for adults and kids.
Open ToolBMR & TDEE Calculator
Calculate Basal Metabolic Rate, TDEE, and daily resting calorie expenditure.
Open ToolCalorie & Macro Calculator
Estimate daily calories, maintenance calories, and macros for weight loss or muscle gain.
Open ToolBody Fat Calculator
Calculate body fat percentage based on US Navy tape measurements.
Open ToolIdeal Body Weight Calculator
Find healthy weight targets using Devine, Robinson & Miller formulas.
Open ToolDaily Water Intake Calculator
Calculate recommended daily hydration and glass count.
Open ToolIntermittent Fasting Calculator
Plan 16:8, 18:6, and OMAD fasting and eating windows.
Open ToolOne Rep Max (1RM) Calculator
Estimate maximum strength and lifting percentages for weights.
Open ToolPregnancy Due Date Calculator
Calculate estimated delivery date (EDD) and trimester schedule.
Open ToolOvulation & Fertility Window
Predict exact ovulation day, 6-day fertile window and conception dates.
Open ToolSleep Cycle & Bedtime Calculator
Find optimal bedtimes and wake-up times with 90-minute REM sleep cycles.
Open ToolPeriod & Menstrual Cycle Tracker
Predict upcoming 3 periods, cycle phases, and PMS symptom schedule.
Open ToolRunning Pace & Marathon Splits
Calculate running pace (min/km, min/mi), finish times and race splits.
Open ToolBlood Pressure Category Checker
Check AHA blood pressure category, Mean Arterial Pressure (MAP) & pulse.
Open ToolBAC Blood Alcohol Calculator
Calculate blood alcohol concentration and hours to sober with Widmark formula.
Open ToolSmoking Cost & Quit Savings
Calculate annual cigarette money saved, investment growth and life regained.
Open ToolAbout Health & Fitness Calculators on CalculatorSmart
All tools within our Health & Fitness Calculators collection are built to run client-side with zero data storage. Whether converting formats, optimizing documents, or crunching numbers, you receive immediate, private, and mathematically verified results.