Pea Gravel Calculator
Quickly estimate cubic yards, tons, and material cost for your Pea Gravel project. Adjust the inputs below and the result updates in real time.
Calculate Your Project
Estimate only. Add 10-15% for compaction and waste.
How this calculator works
The pea gravel is sold and delivered by the ton, not the cubic yard. This keeps the volume math and the weight based unit in sync automatically.
A pea gravel calculator turns three simple measurements, length, width and depth, into the number of tons you need to order. Because Pea Gravel sells by the ton rather than the cubic yard, the calculator first works out the cubic yards your space requires, then converts that volume to weight using the material's density. This page explains what the calculator is doing behind the scenes: how depth changes the total, how the yards to tons conversion works for this stone, and how much extra to add so you are not short on delivery day.
What the Pea Gravel Calculator Computes
Enter the length and width of the area in feet and the depth in inches. The calculator multiplies length by width to get square footage, then factors in depth to find total volume in cubic yards. From there it applies Pea Gravel's density to convert cubic yards into tons, since that is the unit this material is priced and delivered in. The result is a straight order quantity, not a rough guess, so you can order close to what the job actually needs.
Recommended Depth for Pea Gravel
Depth is the number that changes your tonnage the most, so it is worth getting right before you run the calculator. A shallow layer, around 2 inches, works for topping an existing bed or refreshing ground cover where drainage already handles water. Where the gravel needs to stand up to regular foot traffic or hold its shape as a loose base, 3 to 4 inches performs better and resists scattering. When in doubt, round up to the next inch. It is cheaper to add a little more depth up front than to reorder later.
Density and the Yards to Tons Conversion for Pea Gravel
Pea Gravel weighs about 103.7 pounds per cubic foot, which works out to roughly 2,800 pounds per cubic yard. Since a ton is 2,000 pounds, that puts one cubic yard of Pea Gravel at about 1.4 tons. The calculator applies this ratio automatically, so you do not have to do the conversion by hand. If you already know the cubic yards you need and just want the weight, the cubic yards to tons converter, once you have that figure, will do that single conversion for any material, not just this one.
Ordering Tips and Overage
Add about 10 percent to the calculator's result before you order. Depth is rarely perfectly even across a whole area, edges get filled in by hand, and some settling happens after the first watering or foot traffic. Rounding up also protects you from a second delivery charge if the actual area runs a little long. Once you have a tonnage figure you trust, order Pea Gravel by the ton for delivery.
Materials this calculator covers
From $43.24/ton- Size1/4 - 3/8″
- Density2800 lb/yd³
- ColorTan / mixed
From $43.24/ton- Size3/8″
- Density2800 lb/yd³
- ColorMixed earth
From $54.20/ton- Size1 - 3″
- Density2700 lb/yd³
- ColorMixed natural
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How many tons of pea gravel do I need for my project?
Measure the length and width of the area in feet and decide on a depth in inches. Multiply length by width by depth, then divide by 324 to get cubic yards. Multiply that figure by 1.4, since Pea Gravel weighs about 2,800 pounds per cubic yard, and you have your tons. The calculator runs this math for you automatically once you enter the three measurements.
How much area does a ton of pea gravel cover?
One ton of Pea Gravel is about 19.3 cubic feet, based on a density of 103.7 pounds per cubic foot. Spread 2 inches deep, that covers roughly 115 square feet. Spread 3 inches deep, coverage drops to about 77 square feet, and at 4 inches it covers close to 58 square feet. Coverage always shrinks as depth increases, since the same weight has to fill more volume.
Should I order extra pea gravel beyond the calculator's total?
Yes, add about 10 percent to the number the calculator gives you. Real ground is rarely perfectly flat, edges and curves take a bit more material to fill by hand, and gravel settles slightly once it is spread and walked on. That small buffer is usually cheaper than paying for a second delivery if you come up short on the first one.
Is pea gravel priced by the ton or by the cubic yard?
Pea Gravel is priced and delivered by the ton. That is why this calculator converts your square footage and depth into cubic yards first, then applies the material's density to turn that volume into a tonnage figure. Some materials, like mulch or topsoil, are sold by the cubic yard instead, so the correct unit depends on which product you are ordering.
What if the area I am covering is not a simple rectangle?
Split the space into smaller rectangles or squares, calculate the tonnage for each section separately, then add the totals together. This works for L shaped beds, curved borders broken into straight segments, or a yard with more than one gravel area. Running the numbers in sections is more accurate than trying to average one length and width across an irregular footprint.
Does this calculator work for materials other than pea gravel?
This calculator is set to Pea Gravel's own density, so its tonnage results are specific to this material. Other stone, sand or soil products weigh different amounts per cubic yard, so their tonnage will not match. If you already have a cubic yard figure and want to convert it to tons for a different material, use a general weight conversion instead of this material specific tool.