The standard height for electrical outlets above a countertop in a residential kitchen is usually about 4 to 6 inches (approximately 10 to 15 centimeters) above the surface of the countertop. This height is commonly accepted as it allows for easy access to the outlets while leaving enough space for various types of appliances and plugs to be used without obstruction.
However, it's essential to check your local building codes and regulations, as the height requirements may vary depending on the region. Always consult with a licensed electrician or follow the guidelines provided by your local authorities to ensure compliance with safety standards and to meet the specific requirements of your area.