MicrogreensBasic Tools

Free Microgreens Growing Tools

Growing microgreens looks simple until you're staring at a tray wondering if you soaked enough seed whether the light is enough or if you're watering too much. This page collects free, easy to use tools built to answer exactly those questions with no guesswork, no sign up and no experience required.

Each tool here is built from the same hands-on testing behind our growing guides, not generic averages pulled from other sites. Enter a few details about your setup like tray size, seed variety, growing medium and get numbers you can actually act on instead of a one size fits all rule that doesn't match your conditions.

Why Use a Calculator Instead of Guessing

Most microgreens mistakes come down to the same few variables: too much or too little seed, the wrong light exposure, overwatering, or pulling the tray at the wrong stage.

Small errors here compound fast a slightly crowded tray invites mold, a few extra minutes of light each day can stunt growth and overwatering is behind most of the smell and rot issues beginners run into.

A quick calculation up front solves problems that are much harder to fix once a tray is already growing.

These tools are especially useful if you're new to growing microgreens at home. Rather than memorizing rules of thumb that vary by variety, medium and setup you can plug in your own numbers and get a straight answer tailored to your grow.

Built for Every Stage of the Grow

Whether you're just planning your first tray or troubleshooting a batch that isn't behaving the way you expected there's a tool here for that stage. Some calculators help you plan before you start figuring out quantities and timing.

Others help you course correct mid grow or estimate what to expect at harvest based on the choices you've already made.

We're continuing to build out this collection based on the questions readers ask most so if there's a calculation you find yourself doing by hand every time you grow a tray it's worth checking back there's a good chance we're already working on it.