The mass of a piano can vary depending on its size and construction, but a typical upright piano weighs around 200-300 kg, while a grand piano can weigh over 500 kg. The weight of a piano can be calculated by multiplying its mass by the acceleration due to gravity, which is approximately 9.8 m/s².
For example, a piano with a mass of 300 kg would have a weight of approximately 2940 N.