Pea Gravel Calculator
Calculate how much pea gravel you need for a patio, walkway, driveway, garden, landscaping project, or other area. Get an estimate in cubic feet, cubic yards, tons, bags, and cost.
Calculate pea gravel
Enter the dimensions of your area and the depth of pea gravel you want. You can also enter the gravel price to estimate your project cost.
About 33.3 cubic feet.
Based on the entered price per ton.
This calculator provides an estimate. Actual pea gravel quantity can vary because of material density, compaction, uneven ground, and the size of the gravel.
How to use the pea gravel calculator
This pea gravel calculator helps you estimate how much gravel you need for landscaping, walkways, patios, driveways, garden paths, and other projects. You only need the length, width, and desired depth of the area.
- Measure the length of the area you want to cover.
- Measure the width of the area.
- Choose the unit for your measurements.
- Enter the desired pea gravel depth in inches.
- Check the estimated gravel density or adjust it if your supplier provides one.
- Optionally enter the price per ton.
- Click Calculate pea gravel.
The calculator gives you the estimated volume in cubic feet and cubic yards, estimated weight in tons, an approximate number of 50-pound bags, and an optional material cost.
How much pea gravel do I need?
The amount of pea gravel you need depends on the size of your area and how deep you want the gravel layer to be. A larger area or deeper gravel layer requires more material.
For example, suppose you have an area that is 20 feet long and 10 feet wide and you want a 2-inch layer of pea gravel. The area is 200 square feet. At 2 inches deep, the calculator estimates about 33.3 cubic feet, or 1.23 cubic yards, of pea gravel.
When ordering gravel, it is usually useful to allow some extra material for uneven ground, settling, and small measurement errors.
How do I calculate how much pea gravel I need?
To calculate pea gravel, first determine the area in square feet and then multiply it by the desired depth in feet.
Because gravel is commonly sold by the cubic yard, divide the cubic feet by 27 to convert the result to cubic yards.
For example, a 20 ft × 10 ft area with 2 inches of gravel has a volume of:
Dividing 33.33 cubic feet by 27 gives approximately 1.23 cubic yards.
Pea gravel calculator formula
The basic formula for calculating pea gravel is based on the volume of the area you want to cover.
Make sure all three measurements use compatible units before calculating. If your depth is given in inches and your length and width are in feet, divide the depth by 12 to convert it to feet.
Once you have the volume in cubic feet, divide by 27 to determine the approximate number of cubic yards.
How many tons of pea gravel do I need?
The number of tons depends on both the volume of gravel and its density. Pea gravel does not have one exact weight because density can vary between suppliers and materials.
This calculator uses an estimated density of 105 pounds per cubic foot by default. If your supplier gives you a different density or a conversion rate for their pea gravel, you can enter that value instead.
Because of differences in material density, the tonnage calculated here should be treated as an estimate rather than an exact purchasing quantity.
How many bags of pea gravel do I need?
If you are buying pea gravel in bags instead of bulk, the number of bags depends on the size and weight of each bag.
A common retail bag size is 50 pounds, but bags can vary. The calculator uses the estimated total weight and divides it by 50 pounds to provide an approximate bag count.
Round the result up when purchasing bags so you do not run short of material. The exact amount you should buy can also depend on the coverage information printed on the product you purchase.
Pea gravel cost calculator
Pea gravel prices vary by location, supplier, delivery distance, quantity, and whether you purchase bags or bulk material.
If you know the price per ton, enter it into the calculator to get an estimated material cost.
This estimate only covers the pea gravel itself. Delivery, labor, landscape fabric, edging, excavation, and other project materials are not included.
How deep should pea gravel be?
The appropriate depth depends on what you are building. Walkways, decorative landscaping areas, patios, and other applications may use different depths.
For a basic landscaping estimate, many projects use a layer around 2 to 3 inches deep. However, the correct depth depends on the intended use, ground conditions, drainage requirements, and whether the gravel will experience foot or vehicle traffic.
If you are following a contractor's plan or material manufacturer's recommendations, use the specified depth rather than relying on a general rule.
How much does a ton of pea gravel cover?
How much one ton of pea gravel covers depends on the depth of the gravel layer and the actual density of the material.
A thinner layer covers more square feet, while a deeper layer covers fewer square feet. This is why there is no single coverage number that applies to every project.
Instead of estimating coverage from a generic number, enter your own project dimensions and desired depth into the calculator to get an estimate based on the selected density.
Example pea gravel calculation
Suppose you want to cover a 20-foot by 10-foot area with 2 inches of pea gravel.
- Length: 20 feet
- Width: 10 feet
- Area: 200 square feet
- Depth: 2 inches
- Volume: about 33.3 cubic feet
- Volume: about 1.23 cubic yards
- Estimated density: 105 lb/ft³
- Estimated weight: about 1.75 tons
The actual amount of pea gravel required may be different depending on the material you purchase and the conditions of the area.
Buying pea gravel: bags or bulk?
Pea gravel is commonly available in both bags and bulk quantities. Smaller landscaping projects may be easier to purchase in bags, while larger areas can be more practical to order by the cubic yard or ton.
When comparing suppliers, check whether the quoted price includes delivery. Delivery charges can have a significant effect on the total cost of a large gravel order.
Why your actual pea gravel requirement may be different
A gravel calculator provides an estimate rather than a guarantee. Your actual material requirement can differ because of:
- Uneven or sloped ground
- Different gravel density
- Moisture content
- Compaction and settling
- Measurement errors
- Variations in gravel size
- Extra material needed around edges
- Losses during installation
For a real project, compare the calculator estimate with the coverage information supplied by your gravel supplier before placing a large order.
Frequently asked questions
How much pea gravel do I need?
The amount depends on the length, width, and depth of your project. Enter those measurements into the calculator to estimate cubic yards, cubic feet, and tons.
How do I calculate how much pea gravel I need?
Multiply the length by the width and the depth in compatible units to calculate volume. For measurements in feet, divide depth in inches by 12 before multiplying. Divide cubic feet by 27 to convert to cubic yards.
How many tons of pea gravel do I need?
Convert your project's volume into cubic feet and multiply it by the estimated pea gravel density. Then divide the weight in pounds by 2,000 to convert it to US tons.
How many bags of pea gravel do I need?
Estimate the total weight of pea gravel and divide it by the weight of one bag. The calculator uses 50-pound bags as an approximate reference, but actual bag sizes vary by product.
How much does a ton of pea gravel cover?
Coverage depends on the depth and density of the pea gravel. A ton covers more square feet at a shallow depth and fewer square feet at a deeper depth.
What depth should I use for pea gravel?
Many landscaping applications use around 2 to 3 inches, but the appropriate depth depends on the project. Follow project plans, installation guidance, or supplier recommendations when available.
Can I use this calculator for a pea gravel patio?
Yes. Enter the patio length, width, and desired gravel depth to estimate the amount of pea gravel required.
Can I use this as a gravel calculator?
The calculator is designed specifically around pea gravel and its typical density. Other gravel types can have different densities, so use a material-specific density when calculating another type of aggregate.
How accurate is a pea gravel calculator?
It provides a useful estimate, but actual requirements can vary due to density, ground conditions, depth variations, settling, and waste. Check your supplier's product information before ordering a large quantity.