Healthy Weight Calculator

About the Healthy Weight Calculator

A healthy weight calculator shows the weight range associated with a normal BMI (18.5-24.9) for your specific height — answering the question "what should I weigh?" using the most widely used clinical weight-for-height standard. Healthy weight ranges vary substantially by height: at 5'4" (163 cm), the healthy range is approximately 108-145 lbs (49-66 kg); at 6'0" (183 cm), it's 136-183 lbs (62-83 kg). These wide ranges acknowledge that there is no single "ideal" weight — healthy weight is a range, and factors like frame size, muscle mass, and individual physiology mean that two people of the same height can both be healthy at significantly different weights. Our calculator shows the full healthy weight range (BMI 18.5-24.9), the statistical midpoint ideal weight (BMI 21.7), your current BMI if you enter your present weight, and if applicable, how much weight you would need to lose or gain to enter the healthy range. Context is provided by showing how close you are to the boundaries of the overweight (BMI ≥ 25) and underweight (BMI < 18.5) categories. Relevant for adults worldwide who want to understand their weight goals based on this widely used clinical framework.

How It Works

Healthy weight range: Min weight = 18.5 × height(m)²; Max weight = 24.9 × height(m)². Ideal weight (midpoint) = 21.7 × height(m)². Example: 5'9" = 175 cm = 1.75 m. Min = 18.5 × 1.75² = 18.5 × 3.0625 = 56.7 kg (125 lbs). Max = 24.9 × 3.0625 = 76.3 kg (168 lbs). Ideal = 21.7 × 3.0625 = 66.5 kg (147 lbs). Range: 56.7-76.3 kg. BMI calculation for current weight: BMI = weight(kg) / height(m)² = weight(kg) / 3.0625. At 80kg: BMI = 80/3.0625 = 26.1 (overweight). Excess weight = 80 - 76.3 = 3.7 kg (8 lbs) above healthy range. To reach healthy BMI midpoint: lose 13.5 kg (30 lbs).

Tips & Best Practices

• ✓BMI has known limitations for specific populations: highly muscular athletes often have BMI in the overweight range despite low body fat. Older adults who have lost muscle mass may have "healthy" BMI with excessive fat. Asian populations have increased metabolic risk at lower BMI thresholds (overweight: BMI ≥ 23, obese: BMI ≥ 27.5 per WHO Asian guidelines).
• ✓Waist circumference complements BMI: abdominal obesity (measured at the navel) is an independent risk factor for metabolic disease. Risk thresholds: men > 40 inches (102 cm); women > 35 inches (88 cm). Normal-weight individuals with high waist circumference have similar cardiometabolic risk to overweight individuals.
• ✓Even modest weight loss reduces health risk: losing 5-10% of body weight significantly improves blood pressure, blood glucose, triglycerides, and sleep apnea symptoms in overweight individuals — regardless of whether it achieves a "healthy" BMI. Do not delay health-protective weight loss because the full target seems distant.
• ✓Australia: Healthy Weight Week (January) is promoted by Dietitians Australia, emphasizing that healthy weight includes physical activity, nutritious eating, and mental health — not just the scale number. Australian guidelines align with WHO BMI ranges.

Who Uses This Calculator

People setting weight loss or gain goals who want a target range rather than a single number. Healthcare providers counselling patients on weight management goals. People evaluating whether their current weight falls within a clinically normal range. Athletes and fitness enthusiasts understanding how BMI-based ranges apply (and their limitations) to muscular bodies.