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Nitrogen Rate Calculator

Nitrogen Rate Calculator

Calculate exactly how much fertilizer to apply based on your lawn size, desired nitrogen rate, and bag N%.

Calculate Your Nitrogen Application

Enter your lawn details to find out how much product to buy and apply.

💡 The N% is the first number in the fertilizer analysis (e.g. a 32-0-10 bag is 32% nitrogen). Typical lawn N rates are 0.5–1.5 lbs per 1,000 sq ft per application.
Fertilizer to Apply
⚠️ Always water in fertilizer after application. Follow label rates to avoid burn. Do not apply before rain is forecast.
Gear & Tips
What You'll Need
My Spreader Pick
Top Pick
ECHO RB-60 Heavy-Duty Broadcast Spreader
“The spreader I use on my own lawn — nothing else comes close.”
  • 60 lb hopper — covers up to 25,000 sq ft per load
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  • Foot-operated side deflector keeps product off driveways & beds
  • 10" pneumatic tires handle any terrain with ease
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When to Fertilize

Cool-season grasses (fescue, bluegrass) do best with fall applications. Warm-season grasses (bermuda, zoysia) respond well to late spring and summer feeding. Avoid fertilizing drought-stressed lawns.