Lawn Fertilizer Calculator
Estimate fertilizer amounts based on lawn size, N target, and product NPK.
Enter your lawn size, nitrogen target, and fertilizer N percentage to estimate how much to apply.
Lawn summary
Total area
- m²
Fertilizer needed
- kg
Actual N rate
- kg N / 100 m²
The tool multiplies your nitrogen target by your lawn area, then divides by the N percentage of your fertilizer product.
Use the fertilizer bag label to confirm its NPK values and recommended application ranges.
Measurement system
Lawn size
Fertilizer settings