Health & Fitness Calculators

Health & Fitness Calculators – BMI, Calories, TDEE & Body Fat Tools

Health & Fitness Calculators

Track your health goals with calculators for BMI, calories, macros, body fat, TDEE, weight loss, hydration, and performance.

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Tip: Try “calorie deficit”, “water intake”, “VO2 max”, or “one rep max”.

Body Composition & Weight

BMI, body fat, lean mass, and ideal weight tools for quick baseline estimates.

BMI CalculatorBody mass index from height and weight. Overweight CalculatorCheck weight status with simple inputs. Body Type CalculatorEstimate body type from measurements. Ideal Weight CalculatorEstimate healthy weight range. Body Fat CalculatorEstimate body fat percentage. Army Body Fat CalculatorUS Army tape test estimate. Lean Body Mass CalculatorEstimate lean mass vs fat mass. Body Water CalculatorEstimate total body water. Weight Loss PercentageTrack progress as a percentage. Water Weight Loss CalculatorEstimate short-term water weight change factors.

Nutrition, Calories & Metabolism

Daily calorie needs, macros, deficit planning, and hydration support.

BMR CalculatorEstimate resting calorie burn. TDEE CalculatorEstimate daily calorie needs. MET CalculatorEnergy expenditure by activity. Calorie Deficit CalculatorPlan deficit for weight loss. Calories Burned CalculatorEstimate calories burned by activity. Step Calorie CalculatorEstimate calories from steps. Macro CalculatorSplit calories into protein, carbs, fats. Carb CalculatorPlan carbs by calories and goal. Protein Intake CalculatorEstimate daily protein target. Protein Per Meal CalculatorSplit protein across meals. Fat Intake CalculatorEstimate daily fat target. Water Intake CalculatorDaily hydration estimate.

Performance & Fitness

Cardio, running performance, strength training, and fitness metrics.

Heart Rate CalculatorTarget zones based on age and goal. VO2 Max CalculatorEstimate aerobic capacity. Running Pace CalculatorFind pace from distance and time. Marathon Time PredictorPredict marathon finish time. One Rep Max CalculatorEstimate 1RM from reps and weight.

Health & Fitness Calculators FAQ

What is the most useful health calculator?

BMI, BMR, and TDEE calculators are popular starting points because they help you understand baseline body metrics and daily calorie needs.

How do I calculate daily calorie needs?

Use the TDEE calculator with your age, height, weight, and activity level to estimate daily energy expenditure.

What is the difference between BMI and body fat percentage?

BMI is based on height and weight, while body fat percentage estimates the proportion of fat mass in the body.

Which calculator is best for weight loss planning?

Use the Calorie Deficit calculator for your deficit target and the Macro calculator to plan protein, carbs, and fats.

How accurate are these calculators?

They provide estimates using standard formulas. Accuracy depends on your inputs and individual differences such as metabolism and activity level.

Need a different tool?

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