Fertilizer Calculator
Estimate lawn or garden fertilizer product weight, full bags, nitrogen applied, coverage and cost across one or more applications.
Default project preview
1 bags
Treatment area
1,500 ft²
Per application
6 lb
Total nitrogen
2.4 lb
Coverage per bag
5,000 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Product weight = area ÷ rate-area basis × application rate × number of applications. Nutrient weight = product weight × nutrient percentage.
FAQ
Fertilizer Calculator questions
Is fertilizer rate based on product weight or nitrogen weight?+
Labels may state either. This calculator assumes the entered application rate is total product weight and separately reports nitrogen from the entered percentage.
Should a soil test be used?+
A soil test can identify nutrient needs and help avoid unnecessary application.
Why should fertilizer not be overapplied?+
Excess fertilizer can burn vegetation, waste money and contribute to nutrient runoff.