Aktualisiert July 2026

Stone Square Footage Calculator

Measure the area you're covering, choose a depth, and convert square feet to the cubic yards or tons of decorative stone you actually need to order.

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Grundstückslänge

Grundstücksbreite

Nutze die Gesamtfläche, um Rollrasen, Mulch, Rasensamen oder Zäune zu planen. Teile unregelmäßige Grundstücke in Rechtecke auf und addiere die Ergebnisse.

Grundstücksfläche

4,000sq ft

Quadratyard

444.4 yd²

Acre

0.092 ac

1 Acre = 43,560 sq ft. Rollrasen und Rasensamen werden meist pro Quadratfuß oder Quadratyard verkauft.

Was es bedeutet

To calculate square footage for stone, measure the length and width of the bed in feet and multiply them (length × width). Loose decorative stone is sold by volume, so convert: multiply the area by your depth in feet and divide by 27 to get cubic yards. One cubic yard covers about 100 sq ft at 3 inches deep.

Formel & Anleitung

So wird gerechnet

Stone coverage starts with area — length times width — but loose rock is ordered by volume, so you also need a depth. Once you know both, the square footage converts directly to cubic yards or tons.

1Measure the length and width of the bed in feet and multiply them for the area in square feet.
2Choose a depth: 2 inches for a top-up, 3 inches for a new decorative bed, 4 inches for high-traffic or weed suppression.
3Convert depth to feet (inches ÷ 12), then multiply area × depth ÷ 27 to get cubic yards.
4To order by weight, multiply cubic yards by roughly 1.3–1.5 tons per cubic yard.

Rechenbeispiel

In Zahlen

Bed area (20 ft × 15 ft)	300 sq ft
Depth (3 in ÷ 12)	0.25 ft
Cubic yards (300 × 0.25 ÷ 27)	≈ 2.8 cu yd
Weight (2.8 × ~1.4 tons)	≈ 4 tons

A 20 ft × 15 ft bed = 300 sq ft; at 3 in deep that's about 2.8 cubic yards (≈4 tons) of stone.

Genauigkeit & Annahmen

Measure the actual area you plan to cover in stone, not the whole yard.
Loose stone needs a depth — coverage is meaningless without one, since it's sold by volume.
Split irregular or curved beds into rectangles, calculate each, and add them together.
Edging or borders hold the stone in place; measure to the inside of the edging you'll install.

Wichtige Tipps & Regeln

Decorative stone and rock are sold by the cubic yard or the ton, not by the square foot.
Coverage per cubic yard depends on depth: ~160 sq ft at 2 in, ~100 sq ft at 3 in, ~80 sq ft at 4 in.
Stone weighs roughly 1.3–1.5 tons per cubic yard, so a yard delivered by weight is about 1.4 tons.
Flagstone is sold by the square foot instead, so its area is the order quantity directly.

Anwendungsfälle

Für wen dieser Rechner ist

Decorative rock beds

Size river rock or lava rock for planting beds and borders by area, depth, then cubic yards.

Dry creek beds and drainage

Measure the channel as a long rectangle and use a 3–4 in depth so the stone holds and drains.

Flagstone patios

Flagstone sells by the square foot, so your measured area is the order — add ~10% for cuts.

How to calculate square footage for stone

Square footage for stone is the flat area of the bed you're covering, measured in square feet — length times width. That number is where every stone project starts, but for loose decorative rock it's only half the answer. Because stone is poured to a depth rather than laid flat like tile, suppliers sell it by volume (cubic yards) or weight (tons), so you have to convert your area into one of those units before you can place an order.

Start by measuring each bed as a rectangle. For a curved or L-shaped area, break it into simple rectangles, calculate the square footage of each, and add them up — the same approach works for a border that wraps around a patio. Once you have the total area, the calculator above converts it to cubic yards for whatever depth you pick, so you're not guessing at a delivery quantity.

Turning square feet into cubic yards and tons

The conversion is straightforward: area in square feet, times depth in feet, divided by 27 (the number of cubic feet in a cubic yard). A quick rule of thumb is that one cubic yard of stone covers about 100 square feet at 3 inches deep — roughly 160 square feet at 2 inches for a light top-up, or about 80 square feet at 4 inches for a deeper, weed-suppressing layer. Choose your depth first, because it changes the order more than anything else.

Many yards sell by the ton, so it helps to know that a cubic yard of stone weighs about 1.3–1.5 tons depending on the rock. If you're also pricing a gravel base or comparing materials, the depth-to-volume math is identical. Once you have your cubic yards or tons, drop the figure into the cost calculator with your price per unit to turn the measurement into a delivered budget.

Loose stone vs. flagstone — two different measurements

Not all stone is ordered the same way. Loose material — river rock, pea gravel, crushed stone, lava rock — is bought by the cubic yard or ton because it fills a depth. Flagstone, on the other hand, is a flat paving stone sold by the square foot, so your measured area is the order quantity almost directly; just add about 10% for cutting and fitting irregular pieces.

Knowing which type you're buying keeps you from over- or under-ordering. If you're covering a bed or a dry creek, think in cubic yards and depth. If you're laying a patio walking surface, think in square feet and let the area drive the order. When in doubt, ask the supplier how they price the specific stone you want, since the same rock can sometimes be sold either way.

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FAQ

FAQ zum Stone-Rechner

Measure the length and width of the bed in feet and multiply them. A 20 ft by 15 ft bed is 300 sq ft. For loose stone, that's just the first step — convert to cubic yards by multiplying the area by your depth in feet and dividing by 27, since rock is sold by volume, not by the square foot.

It depends on depth. One cubic yard of stone covers about 100 sq ft at 3 inches deep, roughly 160 sq ft at 2 inches, or about 80 sq ft at 4 inches. So a 300 sq ft bed at 3 inches needs about 2.8 cubic yards. Pick your depth first, because it drives the order more than the area does.

Loose decorative stone — river rock, crushed stone, lava rock — is sold by the cubic yard or by the ton, because it fills a depth. Flagstone and other flat paving stone are sold by the square foot. Check how your supplier prices the specific rock, since some materials are available both ways.

A cubic yard of decorative stone weighs roughly 1.3 to 1.5 tons, so about 1.4 tons on average — heavier for dense crushed rock, lighter for porous lava rock. To order by weight, calculate your cubic yards first, then multiply by about 1.4 to estimate the tons you need delivered.

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