GCI Turf Calculator

Take the guesswork out of lawn care. 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.