免费在线BMI减重计算器，基于BMI=体重/身高²公式计算身体质量指数。支持千克、磅、石多单位输入，提供理想体重范围(18.5-24.9)及个性化减重目标计算，专业API服务助力健康管理。
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专为65岁以上老年人设计的免费BMI计算器，采用老年BMI分类标准（<23偏瘦，23-29.9正常，≥30超重），支持公制英制转换，提供精准健康评估和API服务。
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