BMI Calculator


The body mass index (BMI), or Quetelet index, is a statistical measurement which compares a person's weight and height. Though it does not actually measure the percentage of body fat, it is used to estimate a healthy body weight based on how tall a person is.

Use this form to calculate your Body Mass Index
Weight: Stones lbs
Height: Feet Inches



Height in Feet / Inches

44.47st 020.619.218.016.915.915.014.113.312.612
47.67st 722.020.619.318.
50.88st 023.522.020.619.318.
548st 725.023.321.820.519.318.
57.19st 026.424.723.121.720.419.
60.39st 727.926.124.422.921.520.319.
63.510st 029.427.425.724.122.721.420.
66.710st 730.828.827.025.323.822.421.220.018.918.0
7011st 032.330.228.326.524.923.522.221.019.818.8
7311st 733.831.629.627.726.124.623.221.920.719.7
76.212st 035.232.930.828.927.225.624.222.921.620.5
79.412st 736.734.332.130.128.326.725.223.822.521.4
82.513st 038.235.733.431.429.527.826.224.823.522.2
85.713st 739.637.034.732.630.628.827.225.724.423.1
8914st 041.138.436.033.831.729.928.226.725.323.9
92.114st 742.639.837.335.032.931.029.227.626.224.8
98.415st 745.542.539.837.435.
101.616st 047.043.941.138.636.334.232.330.528.927.4
104.816st 748.545.342.439.837.435.233.331.429.828.2
10817st 049.946.643.741.038.636.334.332.430.729.1
11117st 751.448.
114.318st 052.949.446.343.440.838.536.334.332.530.8
117.518st 754.350.847.544.642.039.537.335.333.431.6
120.619st 055.852.148.845.843.140.638.336.234.332.5
123.819st 757.353.550.
12720st 058.754.951.448.245.442.740.338.136.134.2
BMI Less than 20 — Under Weight
BMI 20-25 — Normal Weight
BMI 25-30 — Over Weight
BMI 30-40 — Obese
BMI Over 40 — Severely Obese

Find your ideal weight

WANT to know how much you should weigh?

Then use our BMI calculator.

It's a simple way to find out if you've been pilling on the pounds - or whether you're slim and trim.
Just find your height at the top of the table and your weight on the left hand side.
Then follow the lines upwards and across, and the point where they meet is your ideal weight.
If the lines meet within the green band then you are in the ideal range for your height.
If they meet in the pink band it shows you are overweight and the white band means you weigh less than you should. If they meet in the red band then you are technically obese and in the dark red band you are severley obese - lose weight or risk heart attackes and other weight related illnesses.

How is calculated?

BMI= Weight (kg)
Height² (m²)
BMI= Weight (lb) x 703
Height² (in²)
BMI= Weight (lbs) x 4.88
Height² (ft²)

IMPORTANT: The BMI Calculator is only a guideline and should be treated as such. BMI is only one measure of your health. Body fat percentage, blood pressure, resting heart rate, cholesterol and other measurements are at least as important as BMI. You need to get the whole picture.

Due to its ease of measurement and calculation, it is the most widely used diagnostic tool to identify weight problems within a population, usually whether individuals are underweight, overweight or obese. It was invented between 1830 and 1850 by the Belgian polymath Adolphe Quetelet during the course of developing "social physics". Body mass index is defined as the individual's body weight divided by the square of his or her height. The formulae universally used in medicine produce a unit of measure of kg/m2. BMI can also be determined using a BMI chart, which displays BMI as a function of weight (horizontal axis) and height (vertical axis) using contour lines for different values of BMI or colours for different BMI categories is not responsible or liable for any diagnosis made by a user based on the content of this website.