# Free Online BMI Calculator

## Calculate BMI for Men and Women using the Body Fat Calculator. Find out if you are Underweight, Normal or Obese as per BMI

Home Wellbeing

Body Mass Index Calculator (BMI)

Enter your height and weight in lbs or kg and find your BMI

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## How to use the BMI calculator tool?

• To calculate your BMI using this tool, you have to enter your height and width.
• For height, select the units - feet/inches or cm. Then enter the height in the field marked as 'Your Height' according to the selected unit.
• For eg, if you want to enter height as 5 feet 4 inches, enable feet and enter 5 in feet field and 4 in inches field. If you want to enter height as 185 cms, then select cm as the unit and enter the value 185 in cm field
• For weight, select the units - pound or kg. Then enter the weight as per the selected unit in the field marked as 'Your Weight'
• Click 'Calculate' button. You will automatically see the BMI score in the field marked as 'My BMI'.
• You can also view if your BMI is within normal range, obese or overweight
• The tool also suggests the ideal weight range based on your height.

## How to use this tool for Reverse BMI Calculation?

Reverse BMI calculation means computing the weight using BMI and height You can enter desired BMI and then enter your height to see what your weight should be

• For Reverse BMI calculation, enable the checkbox "BMI Reverse calculator"

• Using this, you can find the ideal weight for the given height such that BMI is good.

• Reverse BMI Formula with height and BMI is Weight in kg = BMI x (height x height). (height is in meters) (kg = bmi/m2)

## BMI Range Reference Table

The bmi for female and bmi for male are both based on the height and weight of the individual.

Underweight bmi range is less than 18.5
Normal bmi range is 18.5 – 24.9
Overweight bmi range is 25 – 29.9
Obese bmi range is > 30
BMI Score
bmi 11 - Underweight BMI. It indicates malnourishment
bmi 15 - < 18.5 is underweight BMI and is not Normal
bmi 18.5, bmi 19, bmi 21 - Normal BMI
bmi 23 - Normal and a Healthy BMI score
bmi 24 - Normal BMI and within the range
bmi 25 - Borderline Overweight BMI
bmi 26, bmi 27, bmi 28 - Overweight BMI
bmi 30 - Obese BMI
bmi 32 - Obese BMI
bmi 40 and above - Extreme Obese BMI

## BMI Formula

• The bmi equation using meter and kg is as follows:

BMI = [weight(kg)]/[height(m)*height(m)]

(BMI = kg/m2)

BMI equation using cm and kg is as follows

BMI = [weight (kg) / height (cm) / height (cm)] x 10,000/h3>

• BMI equation with pound and inches

BMI=703*[weight(lbs)]/[height(in)*height(in)]

## What is BMI?

• BMI stands for Body Mass Index. It is a simple calculation used to estimate body fat based on height and weight.
• It is calculated by dividing weight in kilograms by height in meters squared.
• BMI has a number of advantages such as:
• It is easy to calculate.
• It is free. BMI does not require any specialized equipment or training to calculate.
• It is non-invasive. BMI can be calculated using height and weight measurements,which can be obtained without the need for any invasive procedures.
• It is a useful tool for screening for obesity. BMI can be used to identify individuals who are at risk for obesity and related health problems.
• It can be used to track changes in body fat over time. BMI can be used to monitor weight loss or gain and to assess the effectiveness of weight loss programs.
• BMI is also a useful tool for statistical health research . For example, BMI can be used to track the prevalence of obesity in certain regions, genders and factors due to which it is present.
• BMI is not a perfect measure of body fat and should be used only as a general reference. It does not take into account factors such as muscle mass, bone density, or body composition and can lead to incorrect conclusions in case of athletes and older people. Also, any dietary changes should not be done solely on basis of BMI measurement.

## BMI or RFM - Which one to use?

• BMI (Body Mass Index) and RFM (Relative Fat Mass) are two different measures of body fat
• BMI is calculated using height and weight, while RFM is calculated using height and waist circumference.
• If you are looking for a simple and easy-to-use measure of body fat, then BMI is a good option. However, if you are looking for a more accurate measure of body fat, especially if you have a lot of muscle mass or a different body composition than the average person, then RFM is a better choice.
• It is important to note that neither BMI nor RFM is a perfect measure of body fat. These measures have to be used in conjunction with other measures of health, such as blood pressure, cholesterol levels, and blood sugar levels, to get a complete picture of your overall health.

## BMI Chart for Men and Women

This chart can be used to check what your ideal weight range should be for your height. This is more of an approximation. Go to the row that matches your height and then see the weight ranges under Normal, Obese and Underweight in the same row

emptyNormal BMI (18.5 - 24.9)Obese BMI (> 30)Overweight BMI (25 – 29.9)UnderWeight BMI ( <18.5)
Height (ft-in / inch)Height (cm / m)Weight (lb)Weight (kgs)Weight (kg/lb)Weight (kgs/lb)Weight (kg/lb)
4 ft 10 in / 58 in 147 cm / 1.47 m89 lbs - 119 lbs 39 kgs - 53 kgs> 65.2 kgs / 143.766 lbs> 54.3 kgs / 119.7315 lbs< 40.2 kgs / 88.641 lbs
4 ft 11 in  / 59 in 150 cm /  1.5 m92 lbs - 123 lbs41 kgs - 55 kgs > 67.4 kgs / 148.617 lbs> 56.2 kgs / 123.921 lbs< 41.5 kgs / 91.5075 lbs
5 ft / 60 in152 cm / 1.52 m95 lbs - 127 lbs42 kgs to 57 kgs> 69.7 kgs / 153.6885 lbs> 58.1 kgs / 128.1105 lbs< 43 kgs / 94.815 lbs
5 ft 1 in / 61  in155 cm / 1.55 m98 lbs - 132 lbs43 kgs - 59 kgs> 72.1 kgs / 158.9805 lbs> 60.1 kgs / 132.5205 lbs< 44.4 kgs / 97.902 lbs
5 ft 2 in / 62 in157 cm / 1.57 m102 lbs - 136 lbs45 kgs - 61 kgs> 74.4 kgs / 164.052 lbs> 62 kgs / 136.71 lbs< 45.9 kgs / 101.2095 lbs
5 ft 3 in / 63 in160 cm / 1.6 m105 lbs - 141 lbs47 kgs - 63 kgs> 76.8 kgs / 169.344 lbs> 64.1 kgs / 141.3405 lbs< 47.4 kgs / 104.517 lbs
5 ft 4 in / 64 in163 cm / 1.63 m108 lbs - 145 lbs48 kgs - 65 kgs> 79.3 kgs / 174.8565 lbs> 66.1 kgs / 145.7505 lbs< 48.9 kgs / 107.8245 lbs
5 ft 5 in / 65 in165 cm / 1.65 m112 lbs - 150 lbs 50 kgs - 68 kgs> 81.8 kgs / 180.369 lbs> 68.1 kgs / 150.1605 lbs< 50.5 kgs / 111.3525 lbs
5 ft 6 in / 66 in168 cm / 1.68 m115 lbs - 154 lbs51 kgs - 69 kgs> 84.8 kgs / 186.984 lbs> 70.3 kgs / 155.0115 lbs< 52.1 kgs / 114.8805 lbs
5 ft 7 in / 67 in170 cm / 1.7 m119 lbs - 159 lbs53 kgs - 72 kgs> 86.9 kgs / 191.6145 lbs> 72.4 kgs / 159.642 lbs< 53.6 kgs / 118.188 lbs
5 ft 8 in / 68 in173 cm / 1.73 m122 lbs - 164 lbs54 kgs - 74 kgs> 89.6 kgs / 197.568 lbs> 74.6 kgs / 164.493 lbs< 55.2 kgs / 121.716 lbs
5 ft 9 in / 69 in175 cm / 1.75 m126 lbs - 169 lbs56 kgs - 76 kgs> 92.2 kgs / 203.301 lbs> 76.8 kgs / 169.344 lbs< 56.8 kgs / 125.244 lbs
5 ft 10 in / 70 in178 cm / 1.78 m129 lbs - 174 lbs58 kgs - 78 kgs> 97.5 kgs / 214.9875 lbs> 79.1 kgs / 174.4155 lbs< 58.5 kgs / 128.9925 lbs
5 ft 11 in / 71 in180 cm / 1.8 m133 lbs - 179 lbs59 kgs - 81 kgs> 99 kgs / 218.295 lbs> 81.3 kgs / 179.2665 lbs< 60.2 kgs / 132.741 lbs
6 ft / 72 in183 cm / 1.83 m137 lbs - 184 lbs61 kgs - 83 kgs> 100.4 kgs / 221.382 lbs> 83.7 kgs / 184.5585 lbs< 61.9 kgs / 136.4895 lbs
6 ft 1 in / 73  in185 cm / 1.85 m141 lbs - 189 lbs63 kgs - 85 kgs> 103.3 kgs / 227.7765 lbs> 86 kgs / 189.63 lbs< 63.7 kgs / 140.4585 lbs
6 ft 2 in / 74 in188 cm / 1.88 m145 lbs - 194 lbs65 kgs - 87 kgs> 106 kgs / 233.73 lbs> 88.4 kgs / 194.922 lbs< 65.4 kgs / 144.207 lbs
6 ft 3 in / 75 in191 cm / 1.91 m149 lbs - 199 lbs67 kgs - 90 kgs> 109 kgs / 240.345 lbs> 90.8 kgs / 200.214 lbs< 67.2 kgs / 148.176 lbs
6 ft 4 in / 76 in193 cm / 1.93 m152 lbs - 205 lbs68 kgs - 92 kgs> 111.8 kgs / 246.519 lbs> 93.2 kgs / 205.506 lbs< 69 kgs / 152.145 lbs
6 ft 5 in / 77 in196 cm / 1.96 m157 lbs - 210 lbs70 kgs - 95 kgs> 115 kgs / 253.575 lbs> 65.6 kgs / 144.648 lbs< 70.8 kgs / 156.114 lbs
6 ft 6 in / 78 in198 cm / 1.98 m161 lbs - 216 lbs72 kgs - 97 kgs> 118 kgs / 260.19 lbs> 98.1 kgs / 216.3105 lbs< 72.6 kgs / 160.083 lbs
6 ft 7 in / 79 in201 cm / 2.01 m165 lbs - 221 lbs74 kgs - 100 kgs> 120.8 kgs / 266.364 lbs> 100.7 kgs / 222.0435 lbs< 74.6 kgs / 164.493 lbs
6 ft 8 in / 80 in203 cm / 2.03 m169 lbs - 227 lbs76 kgs - 102 kgs> 123.9 kgs / 273.1995 lbs> 103.3 kgs / 227.7765 lbs< 76.4 kgs / 168.462 lbs
6 ft 9 in / 81 in206 cm / 2.06 m173 lbs - 233 lbs78 kgs - 105 kgs> 127 kgs / 280.035 lbs> 105.8 kgs / 233.289 lbs< 78.5 kgs / 173.0925 lbs
6 ft 10 in / 82 in208 cm / 2.08 m 177 lbs - 239 lbs79 kgs - 108 kgs> 130.5 kgs / 287.7525 lbs> 108.5 kgs / 239.2425 lbs< 80.4 kgs / 177.282 lbs
6 ft 11 in / 83 in211 cm / 2.1 m182 lbs - 244 lbs82 kgs - 110 kgs> 133.55 kgs / 294.47775 lbs> 111.2 kgs / 245.196 lbs< 82.3 kgs / 181.4715 lbs

## Frequently Asked Questions on BMI Index

• It gives a measure of body fat based on height and weight measurements.
It does not consider muscle mass, bone density and other factors and therefore not the most accurate and cannot be used as the basis for any changes as such
It is still a useful guideline and can be one of the ways to track body fat.
It is necessary to calculate BMI to have an idea of what is an ideal weight range for your height.

• You can calculate your bmi using the common bmi formula for men and women given below.

Adults BMI = (weight)/(height * height) which is kg/m2 where kg is weight in kilograms and m2 is height in metres

BMI = kg / (100 x cm)2 with kg and cm

BMI = kg / (39.37 x in)2 with kg and in

BMI = kg / (472.44 x ft)2 with kg and feet

With pounds, BMI = (2.2 lb / m2) since 1 kg = 2.2 lbs

• It is a rough indicator of body fat based on height and weight.
In most cases, it is useful guide to know of potential health risks and in which category a person falls into.
It can act as an early warning system for those getting into obese, overweight and underweight categories and enables them to take corrective action quickly.
It's a useful tracking metrics to see how a person is progressing on a regular basis.
For those into weight reduction, it gives an indication of when and where to stop.
It is also very simple to determine and compute. It does not require any extensive tests or measurements to be done.

• It does not distinguish muscle mass and body fat.
For body builders and athletes with higher muscle mass, the BMI scores may indicate overweight or obese which is not an accurate measure of health risk.
It can be used as one of references among several other metrics and a rough indicator than as an absolute health metric.

• A range of 18.5 to 24.9 is considered normal or good.

• A BMI Range of 25 to 29.9 falls into 'Overweight' category.
A BMI Range of Above 30 falls into 'Obese' range.

• BMI < 18.5 is considered as Underweight

• While there are other alternatives, this is still used as a very quick rough guide.

• BMI Formula is same.
It has to be applied to normal adults and the range chart may not be accurate for elderly and children.

• Relative Fat Mass (RFM)- It uses height and waist circumference to compute the % of body fat.
Waist to Hip Ratio (WHR) - It uses waist to hip ratio to find the fat distribution measure based on male and female.
Body Adiposity Index (BAI) - It uses height and hip measure along with age group and gender and calculates the % of body fat.

• Many recent studies indicate that RFM has a more accurate estimate of body fat % than BMI.

• Waist to Hip Ratio gives better estimate of fat distribution and more accurate to predict cardio vascular diseases as per different studies and research groups.

• Reverse calculate with BMI as 18.9 and BMI as 24.9 and calculate weight for the given height.

BMI = wt in kg / height 2 (m2)

wt in kg = BMI * height square ( m2)

• Using the same BMI formula , we can compute the weight for different heights based on BMI normal chart range.
If height is 5 feet 9 inches, weight should be in the range 126 lbs - 169 lbs or 56 kgs - 76 kgs.
If height is 5 feet 3 inches, then weight should be in the range of 105 lbs - 141 lbs or 47 kgs - 63 kgs.
if height is 6 feet, then weight should be in the range of 137 lbs - 184 lbs or 61 kgs - 83 kgs
Refer Recommented Height to Weight Reference table above for all combinations.