What is the ratio to mix Roundup concentrate with water?

For Roundup Weed and Grass Killer Concentrate Plus, mix between 6 and 12 tablespoons of Roundup to 1 gallon of water, and for the Super Concentrate, use between 3 and 5 tablespoons to 1 gallon of water. For the Extended Control Concentrate, mix 12 tablespoons with a gallon of water.

Roundup Poison Ivy Plus Tough Brush Killer uses a ratio of 12 tablespoons to each gallon of water. Use any type of undiluted Roundup weed and grass or brush concentrate to kill the stump of a newly cut tree or bush by drilling holes in the stump and pouring in the concentrate.