Nitrogen Application Calculator
Figure out how much fertilizer product you need to hit a target nitrogen rate (lbs N per 1,000 sq ft). Enter your lawn size, desired rate, fertilizer %N, and bag size to get product needed and bag coverage.
Fertilizer needed
Enter lawn size, target rate, %N, and bag size.
Formulas: Product needed (lb) = (Area/1000 × Rate) ÷ (%N/100).
Coverage per bag = (bag N content ÷ rate) × 1000.
Safety: Follow product labels, keep granules out of storm drains, and water in as directed. Educational content only.