Your question has been ask many times before and there is no definitive answer as every manufacturer does their own thing. Even the owns who actually have cutting heights printed in inches. They can be way off depending on how the owner or service tech set the deck. Best way to find yours is to measure the height at the lowest setting and then at the highest setting. Use these measurements to find the range. Next cut a flat surface and measure the grass height. Using these measurements you can figure out the differe in each setting.