Grow A Garden Calculator

About This Tool

I built this thing because I kept messing up my garden plans. One year, I planted tomatoes way too close together. Another time, I forgot how much space carrots actually need. It was a mess. So I made a simple calculator to stop guessing and start growing—without the headache.

This isn’t some fancy app with ads or subscriptions. It’s just a straightforward tool to help you figure out how many plants fit in your space, how much soil you’ll need, and roughly how much you can harvest. No fluff. No nonsense. Just answers.

Key Features

• Plant spacing calculator—enter your bed size and plant type, get exact numbers.
• Soil volume estimator—tells you how many bags of soil or compost to buy.
• Harvest yield guess—based on average output per plant, so you know what to expect.
• Works for raised beds, in-ground plots, and containers.
• Includes common veggies like tomatoes, lettuce, beans, and carrots—plus herbs.
• No login. No tracking. It runs right in your browser.

FAQ

Q: Does this work for small spaces like balcony gardens?
A: Yeah, totally. Just measure your container or box in feet or meters, pick your plant, and it’ll tell you how many you can realistically grow. I’ve used it for my 2x4 foot window boxes—no problem.

Q: What if my soil is already decent? Do I still need to add more?
A: Probably not a full refill, but most gardens benefit from a top-up each season. The calculator gives you the total volume needed—just subtract what you think is already good. Or go ahead and refresh it. Your plants won’t complain.