How This Calculator Works
Categorizes into Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (30+).
BMI Metric & Imperial Formulas
BMI = Weight (kg) / [Height (m)]^2 = 703 × [Weight (lbs) / (Height (in))^2]
Join our subscribers list to get the latest news, updates and special offers directly in your inbox
Evaluates weight relative to height based on World Health Organization (WHO) BMI classifications.
Categorizes into Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (30+).
BMI = Weight (kg) / [Height (m)]^2 = 703 × [Weight (lbs) / (Height (in))^2]
Uses the Mifflin-St Jeor equation to compute baseline metabolism and maintenance calories.
Determines personalized daily fluid intake in liters and cups based on physical activity and mass.
Calculates chronological age down to the day and provides life milestone statistics.
From loan amortization to business break-even and live gold bullion rates, RichQuill provides comprehensive online calculators for every stage of your financial journey.
Browse All Calculators →Embed this interactive Body Mass Index (BMI) & Ideal Weight Calculator directly on your blog, financial portal, or client resource page. It is 100% free with the included attribution backlink.
Instant calculators for finance, business, health & productivity
Stories saved on this device for offline reading