Use these simple garden calculators to plan container gardens, balcony planters, grow bags, and small-space growing projects. Each tool gives a practical estimate, so you can buy the right amount of soil, choose a better pot size, and avoid common container gardening mistakes.
Potting Soil Calculator
Estimate how much potting mix you need for round pots, tapered pots, square containers, rectangular planters, window boxes, and grow bags.
Get results in quarts, liters, cubic feet, gallons, and estimated bags of potting soil.
Use the potting soil calculator →
Container Size Calculator
Find the right pot, planter, or grow bag size for tomatoes, peppers, herbs, lettuce, strawberries, sunflowers, lavender, and other container plants.
Get recommended gallons, liters, minimum depth, spacing notes, and estimated soil volume.
Use the container size calculator →
Plant Spacing Calculator
Estimate how many vegetables, herbs, flowers, or strawberries can fit in a raised bed, planter, window box, round container, or small garden space.
Choose a plant, enter your growing area, and get an estimated plant count with spacing, row, layout, and area details.
Use the plant spacing calculator →
Why Use Garden Calculators?
Container gardening often comes down to practical numbers: how much soil to buy, how large a pot should be, and how much room each plant needs. These tools are designed for beginner and intermediate gardeners who want quick estimates without complicated formulas.
More Gardening Tools Coming Soon
We are planning more small-space gardening tools, including a plant spacing calculator, seed starting calculator, and watering estimate calculator.