Lawn Fertilizer Calculator
Calculate the amount of fertilizer needed based on lawn size, NPK ratio, and desired nitrogen application rate.
Inputs
sq ft
%
%
%
lb/1000 sqft
lbs
$
Results
Fertilizer Needed
20.83 lbs
Bags Needed
1 bags
Actual Nitrogen12 lbs
Actual Phosphorus2 lbs
Actual Potassium4 lbs
Total Cost$30
How to Use This Calculator
- Enter lawn area in square feet.
- Input the desired nitrogen application rate in lbs N per 1,000 sq ft (typically 0.5-1.0 lbs).
- Enter the fertilizer label's N-P-K percentages (e.g., 32-0-6 means 32% nitrogen).
- Review the pounds of fertilizer product to apply and spreader setting recommendations.
- Apply at the recommended rate and water in immediately to prevent burn.
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