
Ratio Rite is a proud American family business built on a simple idea: there had to be a better way to measure and mix fluids. What started in a garage has grown into a trusted product used by generations.

Ratio Rite was created by Gerald Sugai after he grew tired of using his wife’s kitchen measuring cups to mix oil and gas for his motorcycles. He designed a measuring cup made specifically for the job, turning a simple problem into the Ratio Rite we know today.

Since day one, Ratio Rite has been manufactured in Los Angeles, California, and our family has remained committed to keeping production in the United States. Today, we continue to make and ship our cups right here in America.