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What Does a Bulk Materials Calculator Do?

A bulk materials calculator is an easy-to-use online tool that provides accurate estimates of your volume needs based on specific criteria.

Comprehensive calculators base their estimates using three main factors:

  • 1. The area to be covered – Adding these numbers together.
  • 2. The type of mulch you’re using – Some mulches are thicker and more voluminous than others, which affects calculations. Thinner mulches are needed in greater quantities to cover an area to a given depth than thicker ones.
  • 3. The intended depth of the mulch layer – The depth of the mulch layer will differ, depending on your intended application.

Apart from the surface area of the space you’re working with, these factors will vary from project to project. It’s important to choose a material that is specially formulated to support specific growing activities; some products are designed for commercial fruit and vegetable cultivation, while others are more adept at warding off lawn and garden weeds.

Similarly, not all materials need to be applied to the same depth. The primary factor that determines depth is whether you’re applying the mulch to bare soil at the beginning of the growing season, or using it to supplement existing growth after the growing season is already underway.

How Do I Use a Material Calculator?

Mulch calculators are designed for intuitive ease of use. You simply need to enter the appropriate information in the given fields, and the tool will do the rest.

However, it’s important to keep in mind that the results you generate will only be as accurate as the information you provide.

If you’re making broad estimates of the area to be covered as well as the depth of the material you need, your results will be less accurate than they would be if you took the time to measure precisely.

As a rule of thumb, 1 yard covers 10′ x 10′ x 3″ thick

What Will the Calculator Tell Me?

The calculator will tell you how much bulk material you need to purchase to cover an area of the indicated size to the indicated depth.

Things to Keep in Mind when Using This Calculator

The single most important thing to keep in mind when using this calculator is to be as accurate as possible in your estimates and projections. If you’re not sure what type of bulk material you need for a specific application, discuss your project with a knowledgeable and experienced team member at WMG Garden & Supply. They will be able to offer helpful advice that will benefit your efforts while helping you keep costs as low as possible.

You should also double-check all fields before finalizing the calculation to make sure that you’re using the correct units.

For example, you may have determined the surface area of your lawn, garden or field in square yards when the calculator needs you to enter this information in square feet. Other calculators may offer a choice of different area or depth units, so be sure you’re working with the right units before submitting your calculations.

If you’re looking for an honest, and reliable bulk material supplier, look no further than WMG Garden & Supply. Talk to one of our experts for more information on how to get started with your next project. We can’t wait to help!

Enter your dimensions


For mulch, we recommend 2-4 inches for optimal moisture retention, soil health, weed suppression and visual appeal.

Please note this calculator is for mulch, topsoil and mushroom manure. Not intended to calculate tonnage for stone.

To calculate tonnage of stone per tractor bucket: (Length’ x Width’ x Depth”) / 327 x 1.5

Please note that prices are subject to change due to demand and supply availability.