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FREE HEALTH & WELLNESS TOOLS

Health & Fitness Calculators

Take control of your wellness journey with our collection of scientifically-backed calculators designed for your health, fitness, and pregnancy goals.

12+

Calculators

100%

Free to Use

Instant

Clinical Results

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Pregnancy Calculator

Track your due date, weekly milestones, and conception date with our clinical pregnancy calculator.

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Pregnancy Weight Gain Calculator

Track healthy, recommended maternal weight gain week-by-week based on pre-pregnancy BMI & IOM guidelines.

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Period & Menstrual Tracker

Predict upcoming menstrual cycles, PMS dates, fertile windows, and cycle phases with scientific accuracy.

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Ovulation & Fertility Calculator

Calculate your most fertile days, peak LH surge, and ovulation timing to maximize chances of conception.

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Calorie Calculator

Estimate the number of calories you should consume daily to meet your fitness or health goals.

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Sleep Calculator

Find the best bedtime or wake-up time aligned with your natural 90-minute sleep cycles for optimal rest.

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BMI Calculator

Check your Body Mass Index (BMI) and see where you fall on the WHO standard scale with AI health advice.

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Body Fat Calculator

Calculate your body fat percentage, lean mass, and fat mass using US Navy standard circumference measurements.

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Ideal Weight Calculator

Estimate the ideal weight for your height considering factors such as gender, age, and body frame type.

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Water Intake Calculator

Calculate your daily hydration needs based on your body weight, climate, and physical activity levels.

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Protein Calculator

Determine your optimal daily protein intake for muscle building, fat loss, or general health maintenance.

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BMR Calculator

Calculate your Basal Metabolic Rate (BMR) to understand the calories your body burns at complete rest.

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Target Heart Rate Calculator

Compute your maximum heart rate and target workout training zones for fat burning and cardio conditioning.

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Age & Chronological Calculator

Calculate your exact chronological age in years, months, days, hours, and find countdown to your next birthday.

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Personal Wellness Suite

Take charge of your health today

Calculate body metrics, track pregnancy milestones, and optimize daily nutrition with 100% private, browser-native tools.

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Got Questions? We've Got Answers

Frequently Asked Questions

Everything you need to know about calculating BMI, tracking calories, protein intake, and optimal hydration.

BMI is calculated by dividing your weight in kilograms by your height in meters squared (BMI = kg/m²). Standard categories include Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), and Obese (30+).

Have questions regarding body formulas or diet planning?

Suggest new health calculators or contact our wellness team anytime.

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Health & Wellness Knowledge Hub

Nutrition Guides, Diet Strategies & Articles

Evidence-based fitness guides, macronutrient calculations, hydration advice, and body composition strategies.

Understanding TDEE and Macro Distribution for Sustainable Fat LossNutritionCalorie / TDEE Calculator
Nutrition Lab• 5 min read

Understanding TDEE and Macro Distribution for Sustainable Fat Loss

Learn how basal metabolic rate and activity levels determine your true calorie needs for cutting or lean bulking.

Read Article5 min read
The Science of Optimal Hydration: Electrolytes, Performance & HealthHydrationwater-intake
Wellness Team• 4 min read

The Science of Optimal Hydration: Electrolytes, Performance & Health

Why drinking the right amount of water based on your body mass boosts cognitive function, recovery, and metabolic rate.

Read Article4 min read
Daily Protein Intake: How Much Do You Really Need for Lean Mass?Fitness & DietBMI Calculator
Fitness Desk• 4 min read

Daily Protein Intake: How Much Do You Really Need for Lean Mass?

Evidence-based guidelines on protein distribution, amino acid profiles, and muscle protein synthesis.

Read Article4 min read

Health & wellness calculators backed by clinical nutrition formulas

Tool Yantra provides reliable, instantaneous fitness, hydration, and nutritional metrics based on Mifflin-St Jeor and WHO body mass guidelines.

100% PRIVATE
CLIENT-SIDE DATA
MIFFLIN-ST JEOR & WHO
SCIENTIFIC FORMULAS
AI DIETITIAN
SMART ADVICE