Decorative gravel calculator

Decorative beds are rarely a clean rectangle, which is the one awkward part of using an area based calculator for them. The workaround is to break the bed into two or three simple rectangles or triangles, run each through the calculator with its own dimensions and depth, then add the results together, rather than trying to average a curved bed's width into one number. It takes a few extra minutes but it is far more accurate than guessing a single blended width for an irregular shape, especially once the bed curves around a path or a tree, where a single average width can be badly wrong at both the narrow and wide ends of the curve.

Marble chips and similar decorative stone are chosen for color and finish more than function, and it is worth thinking about how that finish holds up over time before committing to a large bed. Light colored stone shows dust, fallen leaves and staining more visibly than a darker gravel, and a bed under deciduous trees will need more raking and occasional washing to keep its color than the same bed in an open, swept area. None of that changes how much you need to order, but it is a reasonable factor in choosing where a decorative bed goes versus where a lower maintenance material makes more sense, particularly near a tree that drops a lot of leaf litter or sap through the year. A bed in full sun away from overhanging branches will generally hold its original brightness for far longer with nothing more than an occasional hose down.

If the brightness or chip size of marble is not quite what you are picturing, it is worth comparing against the other decorative stones on this site before ordering, since they are priced and sized differently even where the depth and coverage logic is identical. The 10mm gravel calculator and 20mm gravel calculator cover finer and chunkier neutral toned alternatives if a more muted, less reflective look suits the setting better than bright marble chips, and running the same bed dimensions through each page is a quick way to compare the total cost and look of each option before you commit to one. Edging color and material also affect how a bright stone reads once it is down, so it is worth settling on an edging choice before finalizing the stone rather than fitting it around a finished bed afterward.

Bagged decorative stone carries a much higher price per kilogram than the same material bought loose by the tonne, but bags make sense for a single small bed since there is no minimum order and no leftover pile to store. Once you are covering several beds or a long border, the saving from a bulk order usually outweighs the inconvenience of having a tonne bag or a loose tipped pile sitting on the drive for a day; this breakdown of bulk versus bagged pricing covers roughly where that crossover tends to fall. A weed membrane underneath the stone also reduces how much settles into the soil over time, which keeps the bed looking full for longer between top ups, and it is a far cheaper fix to install at the start than to add later once the stone is already down and has to be lifted again.

If you are planning more than one bed, or a bed alongside a gravel path or a wider gravelled area, run each section through this calculator separately and total them rather than trying to capture a whole garden in one entry, or use the landscape gravel calculator, which is built with multiple areas in mind. For a quick sanity check on a single square or rectangular bed, this worked example for a 10 by 10 area shows the arithmetic end to end, and the general purpose gravel coverage calculator is there if you would rather work from a target coverage rate than a depth figure, which can be a quicker way to sanity check a supplier's own coverage claims. Keeping a note of the exact tonnage or bag count you ordered for each bed also makes it far easier to reorder a matching amount years later when the original bed needs topping up.