How Much Fertilizer for 5,000 sq ft at 1 lb Nitrogen?
Calculate bags of 10% nitrogen fertilizer needed to apply 1 lb of nitrogen per 1,000 sq ft across 5,000 square feet.
How to use this tool
- Enter your lawn or garden area in square feet.
- Enter the desired nitrogen application rate (check soil test recommendations).
- Enter the N percentage from the fertilizer bag's NPK label.
- Enter the bag weight. The calculator returns nitrogen needed, fertilizer pounds, and bags to purchase.
Fertilizing 5,000 square feet at 1 lb of nitrogen per 1,000 sq ft is a standard lawn treatment — this calculator tells you exactly how many bags to buy.
Frequently asked questions
- How do I calculate fertilizer application rate?
- Determine the nitrogen you need (area ÷ 1,000 × N rate). Then divide by the fertilizer's N percentage (first NPK number ÷ 100). Example: 5 lbs N ÷ 0.10 = 50 lbs of 10-0-0 fertilizer.
- What does NPK mean on fertilizer?
- NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K) — the three primary nutrients. A 10-10-10 fertilizer contains 10% of each by weight.