Lawn Fertilizer Calculator — Formule
## 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.
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.
Exemple Résolu
A 5,000 sq ft lawn, 1 lb N/1000 sq ft, using 24-8-16 fertilizer.
- Nitrogen needed = 5,000 / 1,000 x 1 = 5 lbs N
- Fertilizer needed = 5 / 0.24 = 20.8 lbs of 24-8-16
- Per 1,000 sq ft = 1 / 0.24 = 4.2 lbs