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Healthy Weight Calculator — BMI, WHtR & Frame Size

Determine your healthy weight range using BMI, Waist-to-Height Ratio (WHtR), and frame size adjustment. Features the "waist less than half your height" rule.

✓ Formula verified: January 2026For informational purposes only
Goal

Healthy Weight

Results below

Enter Values

years
in / cm
ft
in
Healthy Weight Range (BMI 18.5–24.9 for 1.78m)
129 lbs – 174 lbs

Adjusted Target (small frame)

149 lbs

Devine Ideal Weight (reference)

161 lbs

BMI — Normal weight

▲ 24.4

Waist-to-Height Ratio (WHtR)

▲ 0.5 — Healthy — low health risk

WHtR Health Threshold

▲ Healthy: < 0.5 · Waist should be less than half your height

What if your age changes? 27 years → 129 lbs – 174 lbs · 30 years → 129 lbs – 174 lbs · 33 years → 129 lbs – 174 lbs

Scenario Comparison

Conservative (5%)
$16,470.09
$6,470.09 interest
Your scenario (7%)
$20,096.61
$10,096.61 interest
Aggressive (10%)
$27,070.41
$17,070.41 interest
High-risk (14%)
$40,224.71
$30,224.71 interest
Best return
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Weight Assessment

BMI Scale

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24.4

BMI — Normal

Healthy Weight Range

129 lbs – 174 lbs

Frame-Adjusted

149 lbs

Devine Ideal

161 lbs

Waist-to-Height Ratio

0.5 — Healthy — low health risk

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Related Guides (4)

BMI & Healthy Weight — Complete Guide to Body Mass Index
BMI is the most widely used health screening tool — and one of the most misunderstood. Here is what your number actually means, when to ignore it, and what metrics matter more.
BMI for Children and Teens — Understanding Percentiles
Children BMI works completely differently from adult BMI. It uses percentiles based on age and sex, not fixed categories. Here is how to read a child BMI growth chart.
Waist-to-Height Ratio vs BMI — Which Is More Accurate?
Keep your waist to half your height. This simple rule may be a better health predictor than BMI. Here is the science behind waist-to-height ratio.
Healthy Weight Range by Height — What Should You Actually Weigh?
For a given height, the healthy weight range varies by up to 50 lbs depending on which formula you use. Here is how to find YOUR healthiest weight.
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