1A device for measuring body weight (a scale or bathroom scale). Household models are often called a weight scale or health meter.
毎朝、起きてすぐに体重計に乗る習慣がある。
I have a habit of stepping on the scale right after waking up every morning.
新しい体重計は体脂肪率も測れる機能が付いている。
The new scale has a function to measure body fat percentage as well.
病院ではより精密な体重計を使って測定することが多い。
Hospitals often use more precise weighing machines for measurements.