100% Free & Accurate Tools Verified by Satyajit Giri, M.Tech in Computational Engineering 256-bit Secure Client-Side Calculations

Health & Fitness Calculators

Scientifically verified health tools for BMI, BMR, calorie needs, body fat percentage, and ideal weight.

17 Available & Upcoming Tools
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BMI Calculator

Calculate Body Mass Index (BMI) and healthy weight category for adults and kids.

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BMR & TDEE Calculator

Calculate Basal Metabolic Rate, TDEE, and daily resting calorie expenditure.

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Calorie & Macro Calculator

Estimate daily calories, maintenance calories, and macros for weight loss or muscle gain.

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Body Fat Calculator

Calculate body fat percentage based on US Navy tape measurements.

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Ideal Body Weight Calculator

Find healthy weight targets using Devine, Robinson & Miller formulas.

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Daily Water Intake Calculator

Calculate recommended daily hydration and glass count.

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Target Heart Rate Calculator

Calculate fat burn, aerobic, and max heart rate zones.

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Intermittent Fasting Calculator

Plan 16:8, 18:6, and OMAD fasting and eating windows.

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One Rep Max (1RM) Calculator

Estimate maximum strength and lifting percentages for weights.

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Pregnancy Due Date Calculator

Calculate estimated delivery date (EDD) and trimester schedule.

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Ovulation & Fertility Window

Predict exact ovulation day, 6-day fertile window and conception dates.

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Sleep Cycle & Bedtime Calculator

Find optimal bedtimes and wake-up times with 90-minute REM sleep cycles.

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Period & Menstrual Cycle Tracker

Predict upcoming 3 periods, cycle phases, and PMS symptom schedule.

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Running Pace & Marathon Splits

Calculate running pace (min/km, min/mi), finish times and race splits.

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Blood Pressure Category Checker

Check AHA blood pressure category, Mean Arterial Pressure (MAP) & pulse.

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BAC Blood Alcohol Calculator

Calculate blood alcohol concentration and hours to sober with Widmark formula.

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Smoking Cost & Quit Savings

Calculate annual cigarette money saved, investment growth and life regained.

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About 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.