(EN) Provided are a weighing scale, a weighing method, and an animal litter box that can easily realize highly accurate weight measurement while utilizing an amplifier and an AD converter that are not highly accurate and high resolution. The scale includes a load cell, AMP, and ADC. In the weight measurement of the tip of the measured object, the AMP is set to the first measurement range and the first amplification factor (S3), the output voltage of the load cell is amplified by the AMP, and the output of the AMP is AD-converted by the ADC. Then, the first weight value of the measured object is obtained (S4). In the weight measurement after the measured object, after setting the AMP to the second measurement range narrower than the first measurement range and the second amplification rate larger than the first amplification rate (S5), the output voltage of the load cell is measured by the AMP. A CPU is provided which amplifies and AD-converts the output of the AMP by the ADC to obtain the second weight value of the measured object (S6, S7).高精度・高分解能ではない増幅器及びＡＤ変換器を利用しながら高精度の重量測定を簡易に実現し得る重量計、重量測定方法、及び動物用トイレを提供する。重量計は、ロードセルとＡＭＰとＡＤＣとを備える。計測物の先の重量測定では、ＡＭＰを第１測定レンジ及び第１増幅率に設定して（Ｓ３）ロードセルの出力電圧をＡＭＰにて増幅させ、かつＡＭＰの出力を前記ＡＤＣにてＡＤ変換して該計測物の第１重量値を求める（Ｓ４）。計測物の後の重量測定では、ＡＭＰを第１測定レンジよりも狭い第２測定レンジ及び第１増幅率よりも大きい第２増幅率に設定した後（Ｓ５）、ロードセルの出力電圧をＡＭＰにて増幅させ、かつＡＭＰの出力を前記ＡＤＣにてＡＤ変換して該計測物の第２重量値を求める（Ｓ６、Ｓ７）ＣＰＵが設けられている。
