How many acres will a gallon of Roundup cover?
William Harris
Updated on February 16, 2026
The volume of the spray should increase through that range to insure you kill all the weeds. What is this? Generally, one gallon of a Roundup solution covers about 1000 square feet. If you multiply the number of acres by 10, you will need roughly 440 gallons of Roundup solution per acre.