GCI Turf Calculator

Whether you're applying granular fertilizer, liquid concentrate, or specialty products, this app gives you precise application rates in seconds. Just enter your fertilizer's N-P-K, target nitrogen rate, and lawn size — you'll instantly see how much product you need, how many bags or containers to buy, and exactly what it'll cost.
Save your go-to fertilizers as Presets to skip the data entry next time. Track every application in the built-in Lawn Journal with before and after photos, so you can see what's working and build a complete history of your lawn over time.
Built for homeowners, lawn enthusiasts, and DIY turf nerds who want professional results without the math. Stop guessing. Start growing.