VitalCalc.net — Free Health & Fitness Calculators

VitalCalc.net is a free collection of instant online health, fitness and nutrition calculators. Every tool runs entirely in your browser, requires no account, and keeps your inputs private. Pick a calculator, enter your details, and get clear, educational results in seconds.

Available calculators

Biological Age Calculator — estimate how old your body truly is based on lifestyle factors and biometrics.
Longevity Score Calculator — rate how your daily habits support a long, healthy life on a 0–100 scale.
BMI Calculator — calculate Body Mass Index and understand your weight category.
Calorie Needs Calculator — determine your total daily energy expenditure (TDEE) and target calories.
Macro Calculator — get precise daily protein, carbohydrate and fat targets tailored to your goals.
Intermittent Fasting Calculator — plan your eating and fasting windows using popular IF protocols.
Heart Rate Zone Calculator — find your optimal training zones for fat loss and cardiovascular health.
Chronological Age Calculator — calculate your exact age in years, months and days.

Browse the full calculator library →

Educational use only

VitalCalc provides free online calculators for general informational and educational purposes only. Results are estimates generated from the inputs you provide and are not medical advice, a diagnosis, or a substitute for professional consultation. Always consult a qualified healthcare professional before making decisions about your health, diet, fitness or treatment.