Gravel for a 15 x 25 ft area at 3 in Area
The exact gravel volume and weight for a 15 x 25 ft area at 3 in area. Adjust any field below to try your own area size or material.
Volume Needed
3.472 yd³
Weight
4.86 tons
Area
375.0 ft²
Result
A 15 × 25 ft area (375.0 sq ft) covered 3" deep with crushed stone needs 3.47 cu yd, weighing about 4.86 tons.
Weight needed at different gravel depths (tons)
What is a Gravel Calculator?
A gravel calculator converts an area's footprint and a target depth into the volume of gravel needed — then converts that volume to weight, since gravel is almost always priced and delivered by the ton rather than by the yard. Getting this estimate right matters because ordering short means a second delivery, and ordering too much means paying for material (and disposal) you don't need.
Gravel is one of the most widely produced construction aggregates, used in driveways, drainage systems, walkways, decorative landscaping beds, and as a base layer under patios and concrete. Different gravel types — bank gravel, river stone, pea gravel, crushed stone — pack to different densities, which is why this calculator lets you pick a material or enter a custom density.
Gravel Needed at Different Depths
Holding the area at 375.0 sq ft fixed, here's how much gravel a range of common depths requires at 1.4 tons per cubic yard.
| Depth | Volume (cu yd) | Weight (tons) |
|---|---|---|
| 2" | 2.32 | 3.24 |
| 3" (current) | 3.47 | 4.86 |
| 4" | 4.63 | 6.48 |
| 6" | 6.94 | 9.72 |
| 8" | 9.26 | 12.96 |
Gravel Volume and Weight Formulas
Volume is area times depth, converted to cubic yards; weight then depends entirely on the material's density, which is why the same volume of pea gravel and crushed stone can weigh noticeably different amounts.
Common Gravel Types
Crushed stone is mechanically crushed rock with sharp, angular edges that interlock well — a common driveway and base-layer choice. Pea gravel is small and rounded, inexpensive, and popular for walkways and decorative beds. River rock is larger, naturally smoothed stone typically used decoratively rather than as a structural base. Bank gravel is a natural sand-and-stone mixture prized for its water-draining capacity. Size and shape both affect drainage, compaction, and how comfortable the surface is to walk or drive on.
How Deep Should a Gravel Layer Be?
A minimum of 2-4 inches is a workable baseline for a decorative bed or light-use path. A driveway typically needs a deeper base — often 4 inches of larger crushed stone as a structural base layer, topped with 2 inches of smaller, more comfortable gravel — to support vehicle weight and drain properly without rutting.
Why Density Varies
Density depends on particle size, shape, and moisture content — wet gravel or sand can weigh noticeably more per cubic yard than the same material dry, since water fills the gaps between particles. Suppliers can usually provide an exact density for their specific material; the presets here are typical dry, loose-fill estimates, so treat them as a planning estimate rather than an exact figure for ordering large volumes.
Example — Your Current Inputs
A 15 × 25 ft area (375.0 sq ft) covered 3" deep with crushed stone needs 3.47 cu yd, weighing about 4.86 tons.
Additional Example — A Gravel Driveway
A driveway 12 feet wide by 40 feet long (480 sq ft) gets a 4-inch base layer of crushed stone: 480 × (4 ÷ 12) ÷ 27 = 5.93 cubic yards. At 1.4 tons per cubic yard, that's about 8.3 tons of stone — enough to fill roughly 8-9 standard pickup truck loads, which is why driveway-scale gravel projects are almost always ordered as a single bulk delivery.
About These Parameters
- Area Shape and Dimensions
- Choose rectangle (length × width) or circle (diameter) to match the footprint; break an irregular area into sections and calculate each separately.
- Gravel Depth
- How thick a layer to lay, in inches. 2-4 inches suits decorative beds and paths; driveways typically need 4-8 inches total across base and surface layers.
- Material Type / Custom Density
- Pick the closest preset material, or select Custom and enter an exact density from your supplier — density is what converts the calculated volume into a weight.
- Price per Ton / Price per Cubic Yard
- Optional prices to estimate total cost — enter whichever matches how your supplier prices the material (most bulk gravel is priced by the ton), or both to compare.
Frequently Asked Questions
How many tons of gravel do I need per cubic yard?
It depends on the material — roughly 1.3 to 1.5 tons per cubic yard for most common gravel and stone types, though exact figures vary with particle size and moisture. Always confirm with your supplier for large orders.
Should I order a little extra gravel?
Yes — many suppliers and contractors round up by 5-10% to account for settling, uneven sub-grade, and minor measurement error, especially on larger driveway-scale projects where running short means a costly second delivery.
What's the difference between crushed stone and pea gravel?
Crushed stone is mechanically processed with sharp, angular edges that interlock and compact well, making it a common structural base. Pea gravel is naturally rounded and smaller, more comfortable underfoot but less stable as a load-bearing base — it's better suited to paths and decorative beds than driveways.
Is gravel sold by weight or volume?
Both, depending on the supplier — bulk deliveries are very often priced and weighed by the ton, while some smaller landscaping suppliers price by the cubic yard. This calculator gives you both figures so you can compare either pricing method.