Lawn fertilizer calculator
Area shape
Rectangle / square
Circle
I know the square feet
Length
ft
Width
ft
Diameter
ft
Area
sq ft
Nitrogen on the bag
%
The first number in N-P-K, e.g. 24-0-6
Target nitrogen
lb / 1,000 sq ft
0.5–1 is typical per application
Bag weight
lb
You'll need
Free calculator by Backyard Numbers ↗