Weed Killer Mixing Calculator
Mix by Coverage Area
Calculate herbicide mix for a specific lawn or garden area
Mix by Tank Size
Calculate how much product to add to your sprayer tank
Formula
Product (oz) = (Area / 1000) × Product Rate | Water (gal) = (Area / 1000) × Spray Volume
Frequently Asked Questions
How much weed killer per gallon of water?
It varies by product. Most concentrated herbicides use 1-4 oz per gallon of water. Always follow the label instructions for the specific product you are using.
When is the best time to apply weed killer?
Apply on calm, dry days when temperatures are 60-85°F. Avoid spraying when rain is expected within 24 hours. Early morning or late afternoon is ideal to reduce drift and evaporation.
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