BMI Calculator

Calculate your body mass index (BMI) from your height and weight, in US or metric units, and see the healthy weight range for your height. For adults 20 and over.

US (ft, in, lb) Metric (cm, kg)

Feet Inches Pounds

For adults 20 and over. BMI is a screening measure, not a diagnosis.

What is BMI?

Body mass index is a simple ratio of weight to height squared: BMI = kg ÷ m², or 703 × lb ÷ in² in US units. It was devised by the Belgian statistician Adolphe Quetelet in the 1830s and is used worldwide to screen adults for underweight, overweight and obesity.

Under 18.5: underweight
18.5–24.9: healthy weight
25–29.9: overweight
30 or more: obesity

BMI chart (US units)

Height	100 lb	120 lb	140 lb	160 lb	180 lb	200 lb	220 lb	240 lb	260 lb
4′10″	20.9	25.1	29.3	33.4	37.6	41.8	46.0	50.2	54.3
5′0″	19.5	23.4	27.3	31.2	35.2	39.1	43.0	46.9	50.8
5′2″	18.3	21.9	25.6	29.3	32.9	36.6	40.2	43.9	47.6
5′4″	17.2	20.6	24.0	27.5	30.9	34.3	37.8	41.2	44.6
5′6″	16.1	19.4	22.6	25.8	29.1	32.3	35.5	38.7	42.0
5′8″	15.2	18.2	21.3	24.3	27.4	30.4	33.5	36.5	39.5
5′10″	14.3	17.2	20.1	23.0	25.8	28.7	31.6	34.4	37.3
6′0″	13.6	16.3	19.0	21.7	24.4	27.1	29.8	32.5	35.3
6′2″	12.8	15.4	18.0	20.5	23.1	25.7	28.2	30.8	33.4
6′4″	12.2	14.6	17.0	19.5	21.9	24.3	26.8	29.2	31.6

Healthy weight by height

4′10″	89–119 lb
4′11″	92–123 lb
5′0″	95–127 lb
5′1″	98–132 lb
5′2″	101–136 lb
5′3″	104–141 lb
5′4″	108–145 lb
5′5″	111–150 lb
5′6″	115–154 lb
5′7″	118–159 lb
5′8″	122–164 lb
5′9″	125–169 lb
5′10″	129–174 lb
5′11″	133–179 lb
6′0″	136–184 lb
6′1″	140–189 lb
6′2″	144–194 lb
6′3″	148–199 lb
6′4″	152–205 lb
6′5″	156–210 lb
6′6″	160–215 lb

150 cm	41.6–56 kg
152 cm	42.7–57.5 kg
154 cm	43.9–59.1 kg
156 cm	45–60.6 kg
158 cm	46.2–62.2 kg
160 cm	47.4–63.7 kg
162 cm	48.6–65.3 kg
164 cm	49.8–67 kg
166 cm	51–68.6 kg
168 cm	52.2–70.3 kg
170 cm	53.5–72 kg
172 cm	54.7–73.7 kg
174 cm	56–75.4 kg
176 cm	57.3–77.1 kg
178 cm	58.6–78.9 kg
180 cm	59.9–80.7 kg
182 cm	61.3–82.5 kg
184 cm	62.6–84.3 kg
186 cm	64–86.1 kg
188 cm	65.4–88 kg
190 cm	66.8–89.9 kg
192 cm	68.2–91.8 kg
194 cm	69.6–93.7 kg
196 cm	71.1–95.7 kg
198 cm	72.5–97.6 kg
200 cm	74–99.6 kg

Frequently asked questions

How is BMI calculated?

BMI is your weight in kilograms divided by your height in meters squared: BMI = kg ÷ m². In US units, BMI = 703 × pounds ÷ inches².

What is a healthy BMI?

For adults the World Health Organization classes 18.5 to 24.9 as a healthy weight, 25 to 29.9 as overweight and 30 or more as obesity. For people of Asian descent, lower cut-offs (23 and 27.5) are often used for health risk.

Is BMI accurate?

BMI is a quick screening measure, not a diagnosis. It does not distinguish muscle from fat, so it can overestimate fat in athletes and underestimate it in older adults. Waist size and other checks give a fuller picture.

Does BMI apply to children?

Not directly. For children and teens, BMI is compared with growth charts for their age and sex (BMI-for-age percentiles).