BMI Calculator

Q: What is a healthy BMI for adults?

A healthy BMI range for adults is 18.5 to 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is obese. These ranges may vary slightly for Asian populations, where health risks increase at lower BMI values.

Q: Is BMI accurate for athletes and muscular people?

BMI can overestimate body fat in athletes and people with high muscle mass, since muscle weighs more than fat. A bodybuilder may have a 'overweight' BMI while having very low body fat. For such individuals, body fat percentage, waist-to-hip ratio, or DEXA scans provide better assessments.

Q: How is BMI different for children?

For children and teens (ages 2-20), BMI is calculated the same way but interpreted using age-and-sex-specific percentiles. A child at the 85th-94th percentile is considered overweight, and at or above the 95th percentile is considered obese.

Q: Does BMI differ for men and women?

The BMI formula is the same for both genders, but women naturally have more body fat than men at the same BMI. Some health organizations suggest gender-specific thresholds. For accurate health assessment, BMI should be considered alongside waist circumference and other metrics.

Q: Can BMI predict health risks?

BMI is a screening tool, not a diagnostic one. Higher BMI correlates with increased risk of type 2 diabetes, cardiovascular disease, sleep apnea, and certain cancers. However, other factors like diet, physical activity, family history, and waist circumference also matter significantly.

Weight (kg)

Height (cm)

Enter value

UnitGenderCountry

Ideal Weight Range Table

Based on average adult height for the selected country and sex. Values show the normal BMI range (18.5–24.9).

The highlighted row corresponds to the average adult height for the chosen country and sex to help you quickly compare against typical local averages.

Height	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	100
4' 10" (147 cm)	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54	40–54
4' 11" (150 cm)	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56	42–56
5' 0" (152 cm)	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58	43–58
5' 1" (155 cm)	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60	44–60
5' 2" (157 cm)	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62	46–62
5' 3" (160 cm)	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64	47–64
5' 4" (163 cm)	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66	49–66
5' 5" (165 cm)	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68	50–68
5' 6" (168 cm)	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70	52–70
5' 7" (170 cm)	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72	54–72
5' 8" (173 cm)	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74	55–74
5' 9" (175 cm)	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76	57–76
5' 10" (178 cm)	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79	58–79
5' 11" (180 cm)	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81	60–81
6' 0" (183 cm)	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83	62–83
6' 1" (185 cm)	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86	64–86
6' 2" (188 cm)	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88	65–88
6' 3" (191 cm)	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90	67–90
6' 4" (193 cm)	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93	69–93

What is BMI?

BMI (Body Mass Index) is a simple measurement that uses your height and weight to estimate whether you are underweight, normal weight, overweight, or obese. Developed by Adolphe Quetelet in the 1830s, it remains the most widely used screening tool by healthcare professionals worldwide. While BMI doesn't directly measure body fat, it correlates with other health risk factors like heart disease, diabetes, and hypertension.

BMI Formula

BMI = Weight (kg) / Height (m)²

Your BMI is calculated by dividing your weight in kilograms by the square of your height in meters. For example, a person weighing 70 kg and 1.75 m tall has a BMI of 70/(1.75×1.75) = 22.86. The WHO classifies BMI into categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (≥30).

Worked Example

Weight = 68 kg
Height = 170 cm = 1.70 m
BMI = 68 / (1.70 × 1.70)
BMI = 68 / 2.89
BMI = 23.53
Category: Normal weight (18.5 – 24.9 range)

Frequently Asked Questions

A healthy BMI range for adults is 18.5 to 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is obese. These ranges may vary slightly for Asian populations, where health risks increase at lower BMI values.

BMI can overestimate body fat in athletes and people with high muscle mass, since muscle weighs more than fat. A bodybuilder may have a 'overweight' BMI while having very low body fat. For such individuals, body fat percentage, waist-to-hip ratio, or DEXA scans provide better assessments.

For children and teens (ages 2-20), BMI is calculated the same way but interpreted using age-and-sex-specific percentiles. A child at the 85th-94th percentile is considered overweight, and at or above the 95th percentile is considered obese.

The BMI formula is the same for both genders, but women naturally have more body fat than men at the same BMI. Some health organizations suggest gender-specific thresholds. For accurate health assessment, BMI should be considered alongside waist circumference and other metrics.

BMI is a screening tool, not a diagnostic one. Higher BMI correlates with increased risk of type 2 diabetes, cardiovascular disease, sleep apnea, and certain cancers. However, other factors like diet, physical activity, family history, and waist circumference also matter significantly.

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