CalculatorMine

BMI Calculator

ft
in
lb

Your Results

At 5 ft 10 in and 160 lb, your BMI is 23.0, which is normal on the WHO adult scale (normal is 18.5 to 24.9). A healthy weight for your height is 129 to 173 lb. Your BMI Prime is 0.92 and your Ponderal Index is 12.9 kg/m³. BMI is a quick screen for adults, not a measure of body fat: muscle, age and build all change what it means.

23.0
Your BMI (kg/m²)
Normal
Category
129 to 173 lb
Healthy Weight
In range
To Reach Normal
0.92
BMI Prime

Where your BMI falls on the standard adult scale

  • Underweight, under 18.5
  • Normal, 18.5 to 24.9
  • Overweight, 25 to 29.9
  • Obese, 30 and up
Weight by BMI at Your Height
BMIWeight (lb)Category
16.0112Moderate thinness
17.0118Mild thinness
18.5129Normal
20.0139Normal
22.0153Normal
23.0160Normal
25.0174Overweight
27.5192Overweight
30.0209Obese class I
35.0244Obese class II
40.0279Obese class III

Weight = BMI × height² (5 ft 10 in is 1.78 m). Your BMI is highlighted.

What Is BMI?

Body mass index, or BMI, compares your weight with your height. It's a quick, free way to screen adults for being underweight or overweight, and doctors use it alongside other checks. It doesn't measure body fat, so a muscular person can have a high BMI while being lean.

The World Health Organization's categories for adults 20 and older:

CategoryBMI
Severe thinnessUnder 16
Moderate thinness16 to 16.9
Mild thinness17 to 18.4
Normal18.5 to 24.9
Overweight25 to 29.9
Obese class I30 to 34.9
Obese class II35 to 39.9
Obese class III40 and up
  • Asian adults: health risks tend to start at a lower BMI, so the WHO suggests overweight from 23 and obese from 27.5. Choose the Asian scale in the calculator to use these.
  • Children and teens: BMI is read against growth charts by age and sex, as a percentile, so the adult categories don't apply. Ask a pediatrician.
  • Older adults, athletes and pregnancy: muscle, bone and fluid change what a BMI means, so it can mislead.

Which calculator should I use?

  • BMI Calculator: to see whether your weight is in the healthy range for your height.
  • Calorie Calculator: to see how many calories a day keep your weight steady, or help you lose or gain.
  • Steps to Miles Calculator: to see the distance and calories of your daily steps.

How to Calculate BMI

Divide your weight in kilograms by your height in meters, squared:

BMI= weight (kg)height (m)2

In US units, multiply by 703:

BMI=703× weight (lb)height (in)2
  • Weight: in kilograms, or pounds for the US formula.
  • Height: in meters (centimeters ÷ 100), or inches for the US formula. 5 ft 10 in is 70 inches.
  • 703: turns pounds and inches into the same kg/m² scale.
  • Healthy weight: turn the formula around: weight = BMI × height², at a BMI of 18.5 and 24.9, the ends of the normal range as BMI is usually reported (to one decimal).
  • BMI Prime: BMI ÷ 25, so 1.00 is the top of the normal range. Ponderal Index: weight ÷ height³, which suits very tall or short people better.

Example

Someone 5 ft 10 in tall who weighs 160 lb:

  • BMI: 703 × 160 ÷ 70² = 703 × 160 ÷ 4,900 = 23.0, which is normal.
  • Healthy weight: 18.5 × 4,900 ÷ 703 = 129 lb, to 24.9 × 4,900 ÷ 703 = 173 lb.
  • BMI Prime: 23.0 ÷ 25 = 0.92.
  • At 200 lb the same person's BMI would be 28.7, overweight, and they'd lose about 27 lb, to 173 lb, to reach the normal range.

How to Use the BMI Calculator

"I'm 5 ft 10 in and 160 lb. What's my BMI, is it healthy, and what weight range is healthy for my height?" This calculator answers that.

Let's enter the numbers for this example in each box. They are already filled in when the calculator opens, so you can follow along and then change any box to match your own.

  • Units: Choose US (ft, lb). Metric switches to centimeters and kilograms, and converts what you've typed.
  • BMI Scale: Choose Standard (WHO). Choose Asian adults for the lower cut-offs.
  • Height: Enter 5 ft 10 in. From 3 to 8 feet, or 90 to 250 cm.
  • Weight: Enter 160 lb. From 50 to 700 lb, or 20 to 320 kg. The arrows beside the box, or the arrow keys, change it by 1 lb (0.5 kg) and update the results right away.

Calculate and Reset

Click Calculate to see your results. If a box has a problem, such as a height of 9 feet, a message pops up under that box instead. With the default numbers you get:

  • Your Results: a short summary in words: a BMI of 23.0, normal, a healthy weight of 129 to 173 lb, and your BMI Prime and Ponderal Index.
  • Your BMI: the headline, 23.0.
  • Category: Normal, on the scale you chose.
  • Healthy Weight: 129 to 173 lb, the normal range for your height.
  • To Reach Normal: how much to lose or gain to reach the normal range, or "In range" when you're there already.
  • BMI Prime: 0.92, your BMI compared with the top of the normal range.
  • Where your BMI falls: a bar split into underweight, normal, overweight and obese, with a marker at yours.
  • Weight by BMI at Your Height: the weight that gives each BMI from 16 to 40 at your height, with yours highlighted.
  • Share Results: a link that opens this calculator with your numbers filled in. Copy it, or share it on Facebook or X.

Click Reset to put every box back to its default. BMI is a screening number for adults, not a diagnosis. This is for information only, not medical advice: talk to your doctor about your weight and health.