How to Use This Tool 使用说明

1. Enter your height (in cm or ft/in) and weight (in kg or lbs).
2. Select metric or imperial units using the toggle.
3. Click Calculate to compute your BMI.
4. The result shows your BMI value with a color-coded WHO classification bar.
5. An ideal weight range and daily calorie maintenance reference are provided below the result.

1. 输入你的身高（cm 或 ft/in）和体重（kg 或 lbs）。
2. 使用切换按钮选择公制或英制单位。
3. 点击 计算 计算 BMI 值。
4. 结果显示 BMI 数值和 WHO 五色分类条。
5. 结果下方提供理想体重范围和每日维持热量参考。

Frequently Asked Questions 常见问题

• What is BMI? — BMI (Body Mass Index) is a simple measure that uses your height and weight to estimate whether you are underweight, normal weight, overweight, or obese. Formula: weight (kg) / height (m)².
• What are the BMI categories? — Underweight: <18.5, Normal: 18.5–24.9, Overweight: 25–29.9, Obese Class I: 30–34.9, Obese Class II: 35–39.9, Obese Class III: ≥40.
• Is BMI accurate for everyone? — BMI has limitations. It does not distinguish between muscle and fat mass, so athletes with high muscle mass may be classified as overweight. It also does not account for age, gender, or body fat distribution.

• 什么是 BMI？ — BMI（体质指数）是用身高和体重估算你是否体重过轻、正常、超重或肥胖的简单指标。公式：体重(kg) / 身高(m)²。
• BMI 分类是什么？ — 偏轻：<18.5，正常：18.5–24.9，超重：25–29.9，肥胖 I 级：30–34.9，肥胖 II 级：35–39.9，肥胖 III 级：≥40。
• BMI 对所有人都准确吗？ — BMI 有局限性。它不区分肌肉和脂肪，所以肌肉发达的运动员可能被归类为超重。它也不考虑年龄、性别和体脂分布。