Calculate your BMI, tracking healthy weight targets and fitness recommendations. Explore 26 free online utility tools.
Calculate your Body Mass Index (BMI) using height and weight. Supports metric and imperial systems, visual charts, and history tracking.
Calculate your daily calorie needs (TDEE/BMR) and recommended macronutrients based on activity levels and fitness goals.
Calculate your Basal Metabolic Rate (BMR) at rest using Mifflin-St Jeor and Harris-Benedict formulas.
Calculate your Total Daily Energy Expenditure (TDEE), representing the total calories you burn per day based on activity levels.
Estimate your daily water intake needs based on weight, age, exercise levels, climate conditions, and life stage parameters.
Estimate your body fat percentage, lean body mass, fat mass, and ideal ranges using body circumference measurements (U.S. Navy Method).
Calculate your daily water intake, generate personalized drinking schedules, and track hydration streaks.
Calculate your ideal body weight range using Devine, Robinson, Miller, and Hamwi formulas. Adjust for body frame size and compare against your current weight.
Calculate your optimal daily protein requirements based on age, gender, weight, activity levels, and fitness goals. View meal splits and track protein food sources.
Calculate your pregnancy due date using LMP, conception, IVF, or ultrasound. Track week-by-week progress, pregnancy milestones, and baby size guide.
Determine your optimal weight range based on height, age, gender, and body frame size.
Calculate ovulation dates, fertile windows, next periods, pregnancy test dates, and future cycle forecasts. Plan travel, weddings, and important events with confidence.
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Calculate your BMI weight class, estimate resting metabolism BMR, and track hydration requirements. Grounded in standard WHO and NIH guidelines, these fitness calculators help you set realistic wellness goals.
Our fitness and health calculators are designed in strict accordance with peer-reviewed medical and athletic guidelines, including standard formulas from the World Health Organization (WHO) and the National Institutes of Health (NIH).
BMI measures body fat based on height and weight, calculated as:
BMI = weight (kg) / [height (m)]^2
While BMI is a useful screening tool for general population risk groups (Underweight < 18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese >= 30), it has limitations for athletes with high muscle mass since it does not differentiate between muscle and fat. Consider combining this measurement with waist-to-hip ratio trackers.
For daily calorie planning, we use the highly accurate Mifflin-St Jeor Equation to determine your resting energy output:
Men: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) + 5 Women: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) - 161
This baseline rate is multiplied by an activity factor (from sedentary to highly active) to calculate your Total Daily Energy Expenditure (TDEE), the exact caloric budget needed to maintain, lose, or gain body weight safely.
Open BMI, Calorie Needs, BMR, Body Fat, or Water Intake calculators.
Input height, weight, age, activity multipliers, or body measurements in the form.
Analyze daily caloric budgets, target heart rates, or recommended water intake schedules.
Calculates wellness indices using Mifflin-St Jeor, Harris-Benedict, and BMI equations.
Track hydration targets with a persistent tracker saved in your local browser.
Get customized splits of proteins, carbs, and fats tailored to your weight goal.
Height, weight, and health parameters are calculated locally and never stored online.
We calculate it using standard WHO guidelines for Body Mass Index (BMI) ranges of 18.5 - 24.9, scaling it based on height and adjusted by body frame width (small, medium, large).
Yes, your logged intake, streaks, and settings are preserved in local storage so they remain active when you reopen the page.
We support both the Mifflin-St Jeor and Harris-Benedict formulas, factoring in age, gender, height, and weight to calculate your baseline daily caloric burn.
No. These calculators utilize standard mathematical equations to estimate metrics (like BMI, BMR, or fat percentage) and are intended for general fitness references.
TDEE stands for Total Daily Energy Expenditure. It represents the total calories you burn daily, acting as the starting point for weight loss (-500 cal) or muscle gain (+300 cal).
Our tool uses the U.S. Navy Circumference method (measuring height, neck, waist, and hips) to estimate body composition, which is more accurate than simple BMI for athletes.
Yes. Based on your age and resting pulse rate, our calculators can determine target zones (fat burn, aerobic, peak) for fitness training.
It measures body fat distribution. Higher waist-to-hip ratios indicate abdominal fat deposition, which correlates with higher cardiovascular risks.
All calculations are completed directly inside your browser. No personal parameters or details are ever stored or processed on our servers.
A BMI of 25 is "overweight" for a Western adult, but research shows South Asians carry significantly more body fat at the same BMI — and face higher metabolic risk. The WHO recognises lower BMI thresholds for Asians. Here is what the research says and why it matters.
The answer to "how many calories per day" is not the same for everyone. Your TDEE — Total Daily Energy Expenditure — depends on your weight, height, age, sex, and activity level. Here is the exact formula and tables by goal.
Your Estimated Due Date (EDD) can be calculated several ways — from your last menstrual period (LMP), from the date of conception, or from an early ultrasound. Each method has a different precision. This guide explains Naegele's Rule, LMP calculation, and what Indian doctors typically use.
