BMI of a 5′ 8″, 124 Pound Person

What is the BMI of a man or woman who weighs 124 pounds and is 5 foot 8 inches tall?
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Weight
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For a 5′ 8″ tall person who weighs 124 lbs:
BMI = 18.85
Note: BMI is the same for men and women

Am I Overweight?

Here are the BMI standards as set by the World Heath Organization:

BMICategory
< 18.5Underweight
18.5 - 25Healthy Weight
25 - 30Overweight
> 30Obese

In the United States, the average BMI for adults is 28.8.

BMI Formula

Metric
BMI = kg / m2

Imperial
BMI = (lbs * 0.45359237) / (inches * 0.0254)2

Simplified
BMI = 703 * lbs / inches2

Is BMI Worth Using?

Body Mass Index is a very simplistic method of determining whether a person is overweight. It does not taken into account a person's frame, gender, or muscularity. Furthermore, at least one study has suggested that slightly overweight people may live longer than people in the "normal" range.

Nevertheless, BMI is highly correlated with body fat % and is a decent enough yardstick of a healthy weight.

Body fat estimates for a person with a BMI of 18.85
These are rough estimates based on a formula, and do not reflect differences in muscularity, body types, etc...
Age Male Female
18 10.6% 21.4%
19 10.8% 21.6%
20 11.0% 21.8%
21 11.3% 22.1%
22 11.5% 22.3%
23 11.7% 22.5%
24 11.9% 22.7%
25 12.2% 23.0%
26 12.4% 23.2%
27 12.6% 23.4%
28 12.9% 23.7%
29 13.1% 23.9%
30 13.3% 24.1%
Age Male Female
31 13.6% 24.4%
32 13.8% 24.6%
33 14.0% 24.8%
34 14.2% 25.0%
35 14.5% 25.3%
36 14.7% 25.5%
37 14.9% 25.7%
38 15.2% 26.0%
39 15.4% 26.2%
40 15.6% 26.4%
41 15.9% 26.7%
42 16.1% 26.9%
43 16.3% 27.1%
Age Male Female
44 16.5% 27.3%
45 16.8% 27.6%
46 17.0% 27.8%
47 17.2% 28.0%
48 17.5% 28.3%
49 17.7% 28.5%
50 17.9% 28.7%
51 18.2% 29.0%
52 18.4% 29.2%
53 18.6% 29.4%
54 18.8% 29.6%
55 19.1% 29.9%