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Free lawn calculators

Use these browser tools before you buy seed, order sod, spread fertilizer, spray, water, or time an application.

01Measure and buy

Lawn Measurement and Sod Calculator →Grass Seed Calculator →New Sod Care Guide →Sod Grass Varieties Guide →

02Apply products

Fertilizer Calculator →Spray Rate Calculator →Tank Mix Calculator →Treatment Tracker →

03Time the work

Soil Temperature Tracker →GDD Calculator →Irrigation Runtime Calculator →Can I Spray Today? →

04Why these are separate tools

Most lawn decisions fail because the inputs are guessed: square footage, product rate, water volume, weather window, or timing threshold. These calculators keep each step explicit, then the app gives you the permanent log.

Do this automatically in the app

Download for iPhone Get it on Android

Free to download on iPhone and Android.

UPDATED 2026-06-18