Medical metrology, or measurement science for health, is essential for safety, diagnosis and treatment of patients. The health-care sector has made enormous progress in critical care with more than 15,233 registered health-care facilities including hospitals, clinics, diagnostic laboratories, and blood banks [1]. Bangladesh now has around 2,500+ ICU beds, 1,100+ CCU beds, 1,200+ NICU beds, and more than 8,000 operation theater (OT) units [1]. However, the status of medical metrology in Bangladesh is very concerning [2]. This paper provides a comprehensive overview of the medical metrology situation in Bangladesh by reviewing government statistics, institutional reports, reports from medical institutions and international standards [1,2,3]. It assesses the existing metrological laboratories in Bangladesh, especially the Bangladesh Reference Institute for Chemical Measurements (BRiCM) which is the first government institute to start biomedical calibration services in 2021 [2], and the problems of non-implementation of mandatory policies, lack of human resources and awareness among health policy administrators, unethical calibration practices, and in this regard the National Metrology Institute (NMI) of Bangladesh is not visible [3,4,5]. The fundamental concepts of metrology including measurement uncertainty, error analysis and traceability are discussed using simple formulas [6,7,8]. The impact of uncalibrated medical equipment includes inaccurate diagnosis, unsuccessful treatment, health risks and the cost of healthcare [4,5,9]. The article discusses examples of successful medical metrology practices in countries such as the United States, Germany, and Turkey, which have National Metrology Institutes (NMI) with full capabilities for medical device calibration [10,11,12]. Adopting best practices and international standards from ISO, IEC, BIPM, and WHO [13,14,15], this paper suggests practical recommendations for improving medical metrology in Bangladesh, such as mandatory policies, infrastructure development, training and awareness-raising programs for health administrators [2,16].