siteworkcalcChoose your starting point
Measure a rectangle or circle, enter a known area, or convert a volume you already have. Break an irregular space into non-overlapping parts and estimate each separately.
SOIL & LANDSCAPE / TOOL 04
Stone Calculator.
Measure your space. Plan your stone order.
Estimate bulk volume, convert supplier weight, or work backward to coverage.
01 / YOUR STONE
Plan a bulk stone order
02 / YOUR ESTIMATE
From measurements to material
Enter your measurements, then calculate to see a breakdown.
Choose the right stone quantity
Match the supplier’s product
Stone size, grading, moisture and packing affect bulk density. Ask for the value for your actual product. A solid rock density does not account for spaces between stones.
Check available coverage
Choose “How much will my stone cover?” and enter the volume or weight on hand plus a depth. Weight needs supplier bulk density; no extra allowance is added in this mode.
THE CALCULATION
Volume, weight and coverage
Volume (yd³) = area (ft²) × depth (in) ÷ 324US short tons = yd³ × bulk density (lb/yd³) ÷ 2,000Coverage (ft²) = available yd³ × 324 ÷ depth (in)Metric volume: area (m²) × depth (cm) ÷ 100 = m³. Weight (metric tonnes) = m³ × density (kg/m³) ÷ 1,000. Ordering allowance multiplies the base quantity by (1 + percentage ÷ 100).
1 yd³ = 27 ft³ = 0.764554857984 m³. A US short ton is 2,000 lb; a metric tonne is 1,000 kg. Calculations retain precision until display.
100 ft² at 3 inches
A 10 × 10 ft area at 3 in depth needs 25 ft³, or 0.9259 yd³. If your supplier specifies 2,700 lb/yd³ for that material and state, it weighs 1.25 US short tons.
In reverse, 1.25 US short tons at that same density covers 100 ft² at 3 in. This density is an illustrative input, not a universal stone weight. No allowance is included.
Before ordering stone
Stone or gravel?
Bulk crushed stone and gravel can use the same volume-and-density calculation. Product names alone do not fix their weight per yard. Confirm the actual material and bulk density rather than treating every “3/4 inch” or “#57” product as identical.
Planning a paved driveway?
Estimate the aggregate base here, then use the Asphalt Calculator for the separate paved layer. Each layer needs its own depth and density.
Filling or planting instead?
Use the Dirt Calculator for a general fill space, or the Topsoil Calculator to combine lawn and garden soil areas at different depths.
COMMON QUESTIONS
Stone estimating, explained
How much does a cubic yard of stone weigh?
There is no single answer for every product. Multiply the supplier’s bulk density in lb/yd³ by the number of yards, then divide by 2,000 for US short tons. Without density, this tool reports volume only.
Can I calculate a stone wall or a solid slab?
This calculator is for bulk stone spread in a layer. Veneer walls need face area, openings, corners and product coverage. Solid slabs need rock density instead of bulk density, so they are different calculations.
Does extra allowance correct for compaction?
No. It adds an optional percentage to an order. If your measurements describe a compacted layer, obtain an appropriate density or ordering yield from the supplier. Do not substitute loose density without accounting for the different material state.
METHOD & REFERENCES
Sources and assumptions
Reviewed October 5, 2026. Geometry and unit conversions determine volume. Weight requires user-supplied bulk density; no universal stone-density preset is applied. The example density is illustrative. Depth, allowance and material price are supplied by you.