How BMI Affects Your Health
BMI calculator online results give a quick snapshot of weight category. For more detailed body composition, consider a body fat percentage calculator — BMI does not distinguish between muscle and fat.
Welcome to US Healthcare Organization – Your Free Health Tools Hub
Dive into our Fitness & Health collection of trusted, free calculators designed for everyday wellness tracking.
At HealthCalculator, we provide simple, accurate, and free tools to help you stay on top of your health. Explore our BMI calculator (free BMI calculator online) to track your body mass index, use the calorie calculator (daily calorie needs calculator / TDEE calculator) to estimate your daily energy needs, or try our pregnancy due date calculator (pregnancy due date calculator by LMP) to plan ahead with confidence. Our tools follow evidence-based formulas (Mifflin–St Jeor for BMR, CKD-EPI for eGFR, U.S. Navy for body fat) and are guided by insights from WHO and UNICEF.
Our Health Tools
BMI Calculator
Quickly measure your Body Mass Index (BMI) with our online BMI calculator. Use our BMI calculator for adults or switch to a child/teen version to check BMI percentile. A healthy BMI range (18.5–24.9) lowers the risk of heart disease and diabetes.
Calorie Calculator
Use our daily calorie needs calculator (also called a TDEE calculator) to estimate how many calories your body needs to maintain, lose, or gain weight. Try our calorie calculator for weight loss to plan a safe calorie deficit tailored to your activity level.
Pregnancy Calculator
Plan ahead with our pregnancy due date calculator. Choose “due date by LMP” (last menstrual period) or enter a conception/IVF date for a pregnancy calculator by conception date. We also provide a gestational age calculator to answer “how far along am I?” instantly.
Cardiovascular Risk Calculator
Estimate your 10-year cardiovascular risk with the Framingham and ASCVD options. Use our 10-year heart disease risk calculator or ASCVD risk estimator to support prevention planning alongside your clinician.
Blood Sugar Calculator
Assess your risk of type 2 diabetes with our diabetes risk calculator (FINDRISC). The type 2 diabetes risk test helps identify risk factors and recommends screening where appropriate.
Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy body fat calculator. Enter waist, neck, and hip measurements to get a quick body fat calculator online estimate and track changes over time.
BMR Calculator
Determine your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor BMR calculator. Convert BMR to TDEE with activity multipliers to plan daily calorie intake precisely.
Kidney Function Calculator
Estimate your eGFR using the CKD-EPI eGFR calculator to assess kidney function from creatinine, age, sex, and race (if applicable). Use our kidney function calculator for routine monitoring and to share results with your clinician.
Health Insights
Why Tracking Calories Matters
Using a calorie calculator for daily intake helps with weight management and energy balance. Our accurate calorie calculator uses validated equations so you can plan meals and set realistic goals.
Pregnancy Health and Planning
Our pregnancy due date calculator by LMP and conception-date options provide reliable estimates. Paired with a gestational age calculator, these tools help expectant parents plan prenatal care and appointments.
Understanding Cardiovascular Risk
Assess your 10-year cardiovascular risk using our Framingham and ASCVD calculators. Small lifestyle changes informed by these scores can lower long-term heart disease risk.
Diabetes Risk Assessment
Take a diabetes risk calculator (FINDRISC) to screen for factors that increase type 2 diabetes risk. Early identification encourages preventive steps and screening.
Body Fat Percentage Insights
A body fat calculator U.S. Navy method estimates fat percentage from measurements and is useful for tracking trends alongside BMI.
The Role of BMR in Metabolism
Understanding your BMR (Mifflin St Jeor) helps plan calorie targets. Use the BMR calculator in combination with activity multipliers to set daily calorie goals for weight maintenance, loss, or gain.