Parameters used to determine one's body condition is weight and height. Manually to determine the Body Mass Index (BMI) requires two steps, namely measuring body weight and height then calculate body mass index, so less effective. Using fuzzy logic sugeno method, can be designed a device to predict the condition of the human body based on body mass index by measuring weight and height with just one step using this device. From the results of the research that has been done, the load cell is able to measure the weight well, with an average error of 3.95%, and for ultrasonic sensors are able to detect distances very well, with an average error of 1.5%. As for the overall devices testing there is an average error of IMT results of 4.61%. However, although there are differences in IMT results from of measurement by manual devices and measurement with digital devices, the results of both are still in the same category of body condition. AbstrakParameter yang digunakan untuk menentukan kondisi tubuh sesorang adalah berat badan serta tinggi badan. Secara manual untuk menentukan Indeks Massa tubuh (IMT) membutuhkan dua langkah, yaitu mengukur berat badan serta tinggi badan kemudian dihitung IMT-nya, sehingga kurang efektif. Dengan Menggunakan metode logika fuzzy sugeno, dapat dirancang alat untuk memprediksi kondisi tubuh manusia berdasarkan Indeks Massa Tubuh dengan cara mengukur berat badan serta tinggi badan hanya dengan satu langkah memggunakan alat tersebut. Dari hasil penelitian yang telah dilakukan, load cell mampu mengukur berat dengan baik, dengan error rata-rata sebesar 3,95 %, dan untuk sensor ultrasonik mampu mendeteksi jarak dengan sangat baik, dengan error rata-rata sebesar 1,5%. Sedangkan untuk pengujian alat secara keseluruhan terdapat error rata-rata hasil IMT sebesar 4,61%. Akan tetapi meskipun terdapat perbedaan hasil IMT dari pengukuran dengan alat manual dan pengukuran dengan alat digital, hasil keduanya masih dalam kategori kondisi tubuh yang sama.
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