Planter Box Soil Price Calculator

Our calculator provides highly accurate estimates based on standard soil density calculations. However, actual needs may vary slightly depending on soil compaction, moisture content, and the specific shape of your planter boxes. We recommend adding 5-10% to the calculated amount to account for settling and minor variations.

Potting mix is specifically formulated for containers and planter boxes – it’s lighter, provides better drainage, and contains nutrients tailored for container plants. Garden soil is heavier and designed for in-ground planting. For planter boxes, we always recommend using potting mix or raised bed soil for optimal plant health.

For best results, refresh or replace the soil in your planter boxes every 1-2 years. You can top up with fresh soil annually, but complete replacement every few years helps prevent disease buildup and nutrient depletion. Our calculator makes it easy to determine how much new soil you’ll need when it’s time to refresh your boxes.

Yes! For irregular shapes, simply calculate the average length and width. For circular planters, measure the diameter and use that as both length and width, then multiply the result by 0.8 to account for the circular shape. The calculator will still give you a good estimate of your soil needs.