Free Health Calculators 2026

5 free tools · Last updated March 2026

Calculate BMI, daily calories, basal metabolic rate, ideal weight & body fat percentage — all free, all instant.

⚕️ Health calculators are for informational use only. Always consult a healthcare professional for medical advice.

Calculate your Body Mass Index and find your healthy weight range based on height and weight.

Find how many calories you need daily based on age, gender, height, weight, and activity level.

Calculate your Basal Metabolic Rate — the calories your body needs at complete rest.

Find your ideal healthy weight range using multiple proven formulas (Hamwi, Devine, Robinson).

Estimate your body fat percentage using the U.S. Navy method with simple measurements.