Lawn Fertilizer Calculator
Calculate the amount of fertilizer to apply to your lawn based on area, desired nitrogen rate, and fertilizer analysis.
Fertilizer Needed
20.8 lbs
Fertilizer Needed vs Desired Nitrogen Rate
Calculating Lawn Fertilizer
Fertilizer application is based on the nitrogen (N) rate per 1,000 square feet and the N percentage in your fertilizer product.
Formula
Nitrogen Needed (lbs) = Lawn Area / 1000 x Desired N Rate
Fertilizer (lbs) = Nitrogen Needed / (N% / 100)
Most cool-season lawns need 2-4 lbs of N per 1,000 sq ft per year, applied in 3-4 applications. Warm-season grasses need 1-3 lbs per year.
Example Calculation
A 5,000 sq ft lawn, 1 lb N/1000 sq ft, using 24-8-16 fertilizer.
- 01Nitrogen needed = 5,000 / 1,000 x 1 = 5 lbs N
- 02Fertilizer needed = 5 / 0.24 = 20.8 lbs of 24-8-16
- 03Per 1,000 sq ft = 1 / 0.24 = 4.2 lbs
Frequently Asked Questions
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