bathroom scale; weighing scale
Specifically a scale for measuring body weight, typically used in homes, gyms, or clinics. The cross-reference ヘルスメーター is a trademark sometimes used generically.
See also: ヘルスメーター
Every morning I step on the bathroom scale and check my weight.
Every morning I get on the scale as soon as I wake up.
I weighed myself on the bathroom scale.