The finished height of a kitchen typically refers to the height at which the countertops, work surfaces, and cabinets are installed. In most residential kitchens, the standard height for countertops is 36 inches (91.4 cm) above the floor. This height is considered ergonomic and comfortable for most people to work on and prepare food. However, it's important to note that kitchen designs can vary, and some individuals may have specific needs or preferences that require adjustments to the standard height. It's always recommended to consult with a professional designer or contractor to determine the best height for your specific kitchen layout and requirements.