Most Popular Health Calculators
Our most popular calculators used by thousands of people daily for accurate health metrics
Popular calculator picks
Top picks
Adult BMI Calculator for Men & Women — WHO BMI Guide
Use the adult BMI calculator to find your BMI with WHO categ...
Body Surface Area Calculator (BSA) for Medical Dosing
Calculate BSA with our body surface area calculator for clin...
Navy Body Fat Calculator — Official U.S. Navy Tape Test
Use our Navy body fat calculator to estimate body fat with t...
Protein Calculator for Weight Loss: Set Your Cutting Target
Use our protein calculator for weight loss to set a daily ta...
Popular this week
Recovery Calculator: Readiness Score & Rest Time Guide
Use our recovery calculator to turn sleep, soreness, stress,...
Respiratory Rate Calculator (RR) – Breaths Per Minute
Use our respiratory rate calculator to measure breaths per m...
Age Calculator: Exact Years, Months and Days Online
Use our age calculator to find your exact age in years, mont...
Agility Calculator for T‑Test and Pro Agility (5‑10‑5)
Use our agility calculator to time T‑Test and pro agility sh...
More favorites
Alcohol Calculator: Drinks, Calories, Cost and BAC
Use our alcohol calculator to track standard drinks, alcohol...
Anxiety Calculator (GAD-7): Assess Your Symptoms Now
Use our anxiety calculator to score the validated GAD-7 and ...
Speed, Agility & Power — Athletic Performance Calculator
Analyze running pace, race predictions, strength 1RM, and ju...
Baby Food Calculator — Solids Introduction & Portions
Estimate age‑appropriate portions and plan meal frequency wi...
Browse by Category
Explore our complete collection of health calculators organized by medical category
Body Metrics & Weight
25 calculators
Calculate BMI, body fat percentage, ideal weight, and track fitness progress with 11 professional tools for body composition analysis and weight management.
Nutrition & Diet
41 calculators
Track calories, calculate macros, plan balanced meals, and optimize nutrition with 12 comprehensive diet calculators designed for practical daily use.
Fitness & Exercise
39 calculators
Calculate 1RM, running pace, heart rate zones, and track workouts with 8 essential fitness tools for training planning, progress, performance, and goals.
Women's Health & Pregnancy
24 calculators
Track pregnancy, predict ovulation, calculate due dates, and monitor women's health with 8 specialized tools for fertility, prenatal care, and wellness.
Mental Health & Sleep
28 calculators
Assess mental wellness, optimize sleep cycles, and screen for anxiety or depression with 11 evidence-based tools offering practical insights and guidance.
Health Monitoring & Labs
23 calculators
Interpret lab results, monitor vital signs, and track blood work with 9 clinical calculators that explain ranges and support meaningful health discussions.
Risk & Prevention
25 calculators
Assess disease risk, calculate life expectancy, and plan prevention with 12 evidence-based tools that highlight factors, screening, and lifestyle changes.
Clinical & Medications
19 calculators
Calculate medication dosages, drug conversions, and clinical scores with 8 professional tools built for accuracy, clarity, and quick point-of-care use.
Children & Pets
40 calculators
Track child growth, calculate pet ages, monitor baby milestones, and ensure healthy development with 10 pediatric and pet health tools parents can trust.
Why Choose Health Calculator Online?
Professional-grade health calculators built with medical accuracy and user privacy in mind
Expert Calculators
Professionally designed tools covering every health metric
Instant Results
Get accurate calculations in seconds with detailed explanations
100% Private
No data storage, all calculations done locally
Medical Accuracy
Based on WHO, CDC, and medical guidelines
Professional Health Calculators for Every Need
What you can do with our calculators
Health Calculator Online provides professional health calculators designed with medical accuracy in mind. Each calculator delivers instant, reliable results to help you track and understand your health metrics.
Our most popular calculators include the BMI Calculator for body mass index, Calorie Calculator for daily intake planning, and Pregnancy Due Date Calculator for expecting parents. Each tool provides instant, accurate results based on established medical formulas and guidelines.
Most Comprehensive Calculators
- BMI Calculator - Comprehensive body mass index analysis
- Calorie & Macro Calculators - Complete nutrition planning
- Pregnancy & Ovulation - Family planning tools
- Fitness Calculators - Training and performance metrics
Key Features
- Medical-grade accuracy with WHO/CDC guidelines
- No registration or data storage required
- Mobile-optimized for use anywhere
- Instant results with detailed explanations
Private by design, fast by default
Whether you're tracking fitness goals, managing health conditions, or planning nutrition, our calculators provide the accurate, professional-grade tools you need. All calculations are performed locally in your browser, ensuring complete privacy and instant results.
Start Your Health Journey Today
Professional calculators covering every aspect of health and wellness