Average Life Expectancy Calculator: Know Your Age
How long are you likely to live?
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Muscle Percentage Calculator
A muscle percentage calculator estimates what share of your body weight is skeletal muscle, using just three inputs: body weight, body fat percentage and gender.
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Lean Mass Calculator: Find Your Muscle Mass
A lean mass calculator estimates your lean body mass: everything in your body that is not storage fat, including muscle, bone, water, organs and essential fat.
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PFT Calculator: Free Physical Fitness Test Score Tool
Turn your push-up count, sit-up count and 1.5-mile run time into a single fitness score out of 300.
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Height Percentile Calculator
Is your child short for their age, or just early in the queue? For adults, the same question has a different answer key.
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Ffmi Calculator
A fat-free mass index (FFMI) calculator measures how much lean mass you carry for your height, independent of body fat.
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Bone Mass Calculator
Most people who search for their bone mass want one of two different numbers: a rough estimate of how much their skeleton weighs, or a way to tell whether their bone density is slipping between scans.
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Weight Loss Projection Calculator
A pound of body fat stores roughly 3,500 calories, and that single conversion turns a daily deficit into a timeline: a 500-calorie daily deficit projects to about a pound a week, so 20 pounds takes about 20 weeks.
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Breast Cancer Index Calculator
The Breast Cancer Index is a laboratory test, not a quiz: it measures the activity of 11 genes in tumor tissue to estimate the risk of distant…
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Breast Cancer Risk Estimator: Simplified 4-Factor Calculator
This page is a simplified breast cancer risk estimator, not the IBIS / Tyrer-Cuzick clinical model.
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Featured tool
Lean Mass Calculator: Find Your Muscle Mass
Estimates lean body mass: everything in your body that is not storage fat.
Use calculatorBody composition leads, with the Lean Mass Calculator, the Muscle Percentage Calculator and BMI combined with waist circumference, plus height percentile and bone mass. Training tools follow the same practical line: the One Max Rep Calculator, the Deadlift Strength Calculator, the Marathon Training Calculator and workout calorie estimates.
The everyday measures round it out: the Max Heart Rate Calculator and the Resting Heart Rate Calculator, the Sleep Cycle Calculator, steps-to-distance and treadmill distance, and water intake. A couple of entries here are clinical in tone, such as breast cancer risk estimation; they sit alongside the fitness tools rather than forming a separate medical section.