Last updated: June 1, 2026

Lawn Fertilizer Calculator

Calculate exactly how much fertilizer to apply based on your lawn size and the fertilizer's nitrogen content.

Lawn Size (sq ft)

Nitrogen Rate (lbs per 1000 sq ft)

Fertilizer N% (first number on bag)

Bag Weight (lbs)

728 × 90 Leaderboard

320 × 100 Mobile Banner

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Related Calculators

Calculate appliance electricity costs per month and year.

Calculate your swimming pool volume in gallons and liters.

Calculate rolls of wallpaper needed for your room.

Calculate heating/cooling BTU requirements for any room.

Estimate moving costs based on distance, home size, and services.

Estimate solar panel system size and savings for your home.

Most lawns need 1 lb of nitrogen per 1,000 sq ft per application. Apply 2-4 times per year.

The three numbers (e.g., 24-0-10) represent the percentage of Nitrogen-Phosphorus-Potassium (N-P-K).