免费BMI计算器
根据身高和体重计算身体质量指数(BMI)，了解体重是否在健康范围内。
BMI
24.4
BMI vs Weight
公式
## How BMI Is Calculated ### Formula (Imperial) **BMI = (Weight in lbs x 703) / (Height in inches)^2** ### BMI Categories | BMI | Category | |---|---| | Below 18.5 | Underweight | | 18.5 - 24.9 | Normal weight | | 25.0 - 29.9 | Overweight | | 30.0+ | Obese |
计算示例
A person weighing 170 lbs at 5 feet 10 inches.
- 01Height in inches = 5 x 12 + 10 = 70 inches
- 02BMI = (170 x 703) / (70 x 70)
- 03= 119,510 / 4,900
- 04= 24.4 (Normal weight)
常见问题
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is classified as obese. However, BMI does not account for muscle mass, bone density, or body composition.
Is BMI accurate?
BMI is a useful screening tool but has limitations. It may overestimate body fat in athletes with high muscle mass and underestimate it in older adults who have lost muscle. It does not distinguish between fat and lean tissue.
What is a good BMI for my age?
For adults, the standard BMI categories apply regardless of age (18.5-24.9 is normal). However, older adults (65+) may have healthier outcomes at a slightly higher BMI (23-27). For children and teens, BMI is interpreted using age- and sex-specific growth charts.
Can I have a healthy BMI but still have too much body fat?
Yes. This is sometimes called "normal weight obesity" or "skinny fat." A person with low muscle mass and high body fat can fall in the normal BMI range while still carrying unhealthy levels of visceral fat. Body fat percentage tests give a more accurate picture.
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