From these numbers
170 lb at 5 ft 10 in is a BMI of 24.4.
This page calls that Normal weight. The CDC calls the same band Healthy weight.
At this height, a BMI from 18.5 to 24.9 weighs about 128.9 lb to 173.6 lb.
BMI prime is 0.98, this BMI divided by 25.
/c/bmi?unit=imperial&weight=170&ft=5&in=10&cm=178
Your BMI
24.4
Normal weight
BMI category scale
Healthy weight low
128.9 lb
Healthy weight high
173.6 lb
BMI Prime
0.98
Category
Normal weight
BMI is a screening tool, not a diagnosis. Not intended for athletes, children, or pregnant women — not medical advice.
Learn more
How this calculator works and what to know before using it
What this calculator does
Calculates Body Mass Index from height and weight, shows your category, and estimates a healthy weight range for your height.
Understanding your result
BMI is a screening tool, not a diagnosis. It estimates body fat based on height and weight. A result outside the normal range suggests talking to a healthcare provider — it does not by itself mean you are unhealthy.
How to use it
- Choose imperial or metric units.
- Enter weight and height.
- Read your BMI score, category, and healthy weight range.
Quick reference
Adult BMI categories used here
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
Formula used
Body mass index
Imperial: BMI = 703 × weight(lb) / height(in)² · Metric: BMI = weight(kg) / height(m)²
Source. Metric BMI is weight in kilograms divided by height in meters squared. The pound-and-inch form multiplies weight in pounds by 703 and divides by height in inches squared. Categories follow the adult cut points published by the CDC: under 18.5, 18.5 to under 25, 25 to under 30, and 30 or higher. This page labels the second band Normal weight. CDC calls it Healthy weight. CDC, calculating BMI, CDC, adult BMI categories.
Updated November 1, 2026
Example
5'10" and 170 lb → BMI ≈ 24.4 (normal weight range).
Good to know
- BMI does not distinguish muscle from fat — athletes may score high.
- Not intended for children, pregnant women, or the elderly.
Common questions
- What is a healthy BMI range?
- For most adults, WHO defines normal weight as BMI 18.5 to 24.9. Individual health depends on many factors beyond BMI alone.
- Is BMI accurate for muscular or athletic people?
- Often not. Muscle weighs more than fat, so fit individuals may have a high BMI despite low body fat. Body composition tests give better context.
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