Free Tool

Fertilizer Calculator

Find out exactly how many bags of fertilizer you need for your lawn. Compare products, bag sizes, and costs.

🌱Enter Your Details

NPK 32-0-4Any SeasonAll grass types, any season. Strengthens and builds thick, green lawns.
3 bags
5,000 sq ft/bag × 3 = 15,000 sq ft covered
$87.00
est. total
3,000 sq ft of leftover coverage. Save the remainder for touch-ups
Scotts Turf Builder Lawn Food
$29 per bag · $87.00 total

As an affiliate, we may earn a commission from qualifying purchases, at no extra cost to you. Learn more

Don't know your lawn size? Measure it with LotSite for free →

Quick Reference

Fertilizer Coverage Chart

Bags needed per lawn size for popular Scotts fertilizer products.

2,000 sq ft
Turf Builder
1 bags
Weed & Feed
1 bags
Green Max
1 bags
4,000 sq ft
Turf Builder
1 bags
Weed & Feed
1 bags
Green Max
1 bags
5,000 sq ft
Turf Builder
1 bags
Weed & Feed
1 bags
Green Max
1 bags
8,000 sq ft
Turf Builder
2 bags
Weed & Feed
1 bags
Green Max
1 bags
10,000 sq ft
Turf Builder
2 bags
Weed & Feed
1 bags
Green Max
1 bags
15,000 sq ft
Turf Builder
1 bags
Weed & Feed
1 bags
Green Max
3 bags
Fertilizer Guide

How to Choose the Right Fertilizer

Choosing the right lawn fertilizer starts with understanding what your lawn needs. A general-purpose fertilizer like Scotts Turf Builder (32-0-4) works well for most lawns year-round. If weeds are a problem, a combination weed-and-feed product handles both in a single application.

For a quick green-up, look for a high-nitrogen formula with iron, like Scotts Green Max (27-0-2). Southern lawns with warm-season grasses like St. Augustine and Bermuda do best with a Southern-specific formula that accounts for their higher potassium needs.

The single most important factor in getting fertilizer right is knowing your lawn size. Over-applying wastes money and can burn your grass. Under-applying gives poor results. Use LotSite to measure your actual grass area, not your total lot, so you buy exactly what you need.

FAQ

Frequently Asked Questions

Measure your lawn in 30 seconds

Enter your address to get your exact lawn square footage. Free.

Also check out our mulch calculator and grass seed calculator