Fitness
BMI, calorie deficit, one-rep max, water intake, and body metrics calculators.
Showing 17 tools
Fitness
Army Body Fat Calculator
Enter sex, age, body weight, and abdomen circumference at the navel to estimate the current Army one-site tape result and compare it with the age-based standard.
BMI Calculator
Enter your height, weight, age, and sex to see your BMI score, WHO category, and an estimated body fat percentage (Deurenberg formula). The result panel shows a color-coded BMI spectrum and a visual body shape reference that updates by category. Review the limitations and population-specific thresholds before acting on any result.
BMR Calculator
Enter your age, sex, weight, height, and formula choice to see your Basal Metabolic Rate in kcal/day plus estimated TDEE at two activity levels. Adjust any input to understand how each factor shifts your resting calorie burn — the foundation of every daily calorie target.
Body Fat Calculator
Enter height, neck, waist, and when needed hip circumference to estimate body-fat percentage with the circumference formula used by this calculator. Treat the result as a tape-measure estimate, not a clinical measurement.
Bra Size Calculator
Calculate bra size (band + cup) from Band measurement, Bust measurement, with the key formulas and caveats needed to interpret the result correctly.
Calorie Calculator
Enter your age, sex, height, weight, and activity level to see your BMR, total daily calorie needs (TDEE), and targets for weight loss and gain. Adjust your activity level to explore what changes when your routine does — before you commit to a calorie plan.
Calorie Deficit Planner
Enter your maintenance calories, target weight change, and timeline to get a daily calorie target. See whether your plan falls within the safe deficit range and how adjusting the timeline changes daily intake. Balance speed with sustainability — aggressive deficits cost lean mass and trigger stronger metabolic adaptation.
Calories Burned Calculator
Enter body weight, activity, and duration to estimate total calories burned and the average burn rate for the selected exercise.
Healthy Weight Calculator
Estimate the adult BMI-based weight range for your height and use it as a screening reference, not a complete health assessment.
Height Calculator
Convert height units and review a rough mid-parental child-height estimate, with a clear reminder that growth estimates are not medical predictions.
Ideal Weight Calculator
Enter height, sex, and frame setting to compare Devine, Robinson, and Miller ideal-body-weight formulas. Read the result as a reference range, not as a personal diagnosis or health target.
Lean Body Mass Calculator
Estimate lean body mass and fat mass from total body weight and body-fat percentage, then use the result as a body-composition reference.
One Rep Max Calculator
Enter the weight you lifted and the number of repetitions to estimate your one-rep max and a practical 80% training load.
Pace Calculator
Enter distance and elapsed time to find your pace per kilometer or mile and compare race-time projections that assume the same pace continues.
Sleep Calculator
Choose your wake-up time and a number of sleep cycles to estimate a practical bedtime with a small fall-asleep buffer.
Target Heart Rate Calculator
Estimate a training heart-rate zone from age, resting heart rate, and chosen intensity using both simple max-HR percentages and the Karvonen method.
Water Intake Calculator
Enter your body weight, daily active minutes, and climate to get a personalized hydration estimate in liters per day. Adjust any input to see how a hot day or a longer workout shifts your water needs — before you set a daily hydration goal.
