There is no definitive answer to this question as the cost will vary depending on a number of factors, such as the type and size of cat scale you use, and where you purchase it from. However, as a general guide, you can expect to pay anywhere from $30-$100 for a basic cat scale. If you require a more sophisticated or specialized scale (for example, one that can weigh your cat in different positions), then the price may be higher. Ultimately, the best way to find out how much it will cost to use a cat scale is to get in touch with a local pet store or veterinarian and ask for a quote.