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Gravel, Sand & Mulch Calculator — Volume, Tonnes, Brass & Bags
Work out the gravel, sand, crushed stone, pea gravel or mulch you need for a driveway, path, base layer or garden bed. Enter the area and depth to get the volume in cubic feet, cubic yards, cubic metres and brass (100 cu ft, the unit used for sand and aggregate in much of India), the weight in tonnes, the number of bags and the cost.
Your inputs
Quick start — try a typical case
Typical: 2–4 in (5–10 cm) for paths and gravel beds, 2–3 in for mulch, 4–6 in for a driveway base.
Allowance for compaction, uneven ground and spillage.
Your result Live
Material Needed
2.04 cubic yards
55 cu ft · about 3.06 US tons (2.77 tonnes)
- Volume
- 1.557 m³ · 55 cu ft · 2.04 yd³
- In Brass (100 cu ft)
- 0.55 brass
- Weight
- 2,772 kg · 2.77 tonnes · 3.06 US tons
- Area Covered
- 200 sq ft at 3 in deep
- Area × depth · 91%1.42 m³
- Extra · 9%0.14 m³
Weights are typical for the material; damp or compacted material weighs more. Suppliers may sell by volume or by weight — ask which, and their density.
How this is calculated
Volume = area × depth × (1 + extra %) · Weight = volume × density · 1 yd³ = 27 cu ft · 1 brass = 100 cu ft ≈ 2.83 m³
- Density
- Gravel ≈ 1.4–1.7 t per yd³, dry sand 1.3–1.5, damp sand 1.5–1.7, mulch ≈ 400–800 lb per yd³
Multiply the area by the depth to get the volume, then add a little for settling and spillage. Gravel and sand are often sold by weight, so the volume is multiplied by the material's bulk density. In India sand and aggregate are commonly sold by the brass — 100 cubic feet.
Assumptions & sources
- Flat, even depth over the whole area.
- Densities are typical loose values; check your supplier's figure.
- 1Gravel and sand weight per cubic yard — Inch Calculator
- 21 brass = 100 cubic feet (≈ 2.83 m³) — Unacademy
Calculator ID HOME-AGGREGATE-001 · version 1.0.0
Common questions
How much gravel do I need for a 20 × 10 ft area, 3 inches deep?
200 sq ft × 0.25 ft = 50 cu ft ≈ 1.85 cubic yards; with 10 % extra about 2 cubic yards, or roughly 3 US tons of gravel.
What is a brass of sand?
A volume of 100 cubic feet (about 2.83 m³), used for sand and aggregate in much of India. It weighs roughly 4.5–5 tonnes depending on moisture.
How many bags of mulch make a cubic yard?
27 cu ft in a cubic yard, so 13.5 bags of 2 cu ft.