How to use the Pea Gravel Calculator
- Need a quantity?Choose Quantity, enter a footprint and your chosen uniform depth. Select Rectangle, Known Area, Circle or Triangle.
- Have material already?Choose Coverage, enter the amount and desired depth. Volume is direct; mass also needs your supplier density.
- Add only your product values.Density, bag size, supplier increment and all prices start blank. Example dimensions are editable and are not installation recommendations.
How much pea gravel do I need?
Footprint area × entered depth gives geometric volume. Rectangle uses length × width; a circle uses π × radius²; a triangle uses half the base × perpendicular height. Known Area accepts a measured area directly. All assume uniform depth.
Extra allowance is optional for handling, leveling, site variation or waste. It starts at zero, stays visible separately and does not prescribe an installation percentage. Project volume includes your entered extra; supplier and whole-bag rounding never change it.
Pea gravel coverage by depth
Coverage area = available volume ÷ depth. At a fixed material quantity, doubling depth halves geometric coverage. Imperial area is square feet; Metric area is square meters. Enter the intended depth for your project, not a presumed universal installation depth.
For mass quantity, available volume = entered mass ÷ entered density. No statement that a ton always covers a fixed area is valid without those inputs. Field depth, material losses and unevenness can change real installed coverage.
Cubic yards vs tons of pea gravel
Cubic yards and cubic meters measure volume. US short tons and metric tonnes measure mass. Estimated weight at entered density = project volume × supplier/product density. Density starts blank and is not claimed to be verified by BuiltTally.
1 yd³ = 27 ft³ = 0.764554857984 m³. 1 US short ton = 907.18474 kg; 1 metric tonne = 1,000 kg. Density converts from short tons/yd³ to kg/m³ while preserving equivalent weight. Density is entered independently on this page; no Gravel density is inherited.
Estimating bags vs bulk
Choose an explicit bag basis. Volume bags use ft³/bag or L/bag and need no density. Weight bags use lb/bag or kg/bag and require valid density to translate project volume to estimated mass. Bag sizes remain blank until you enter the product label. 1 ft³ = 28.316846592 L; 1 lb = 0.45359237 kg.
Exact bag equivalent divides the project requirement by the selected bag size. Round upward for whole bags. An optional supplier volume increment rounds bulk order separately. Volume, mass and whole-bag prices are independent comparisons; no buying method is preferred. Cost excludes delivery, tax and minimum orders. Coverage currently accepts direct volume/mass quantity, rather than a bag-count input.
Quantity example: a measured footprint
Example dimensions: 12 ft × 8 ft × 2 in. Depth = 2 ÷ 12 = 1/6 ft. Geometric volume = 12 × 8 × (1/6) = 16 ft³. Cubic yards = 16 ÷ 27 ≈ 0.5925926 yd³, displayed as 0.59 yd³. With zero extra, project volume equals geometric volume.
The 2 in depth is an example input, not a recommended pea-gravel depth. No density, bag size, supplier increment or price is attached to this example.
Coverage example: quantity divided by depth
Example available material: 1 yd³ = 27 ft³. Example depth: 2 in = 1/6 ft. Coverage = 27 ÷ (1/6) = 162 ft², equivalent to 15.05029248 m². No density is needed.
This is geometric coverage at the entered uniform depth. The depth is hypothetical, not an installation specification, and actual field coverage is not guaranteed.
Pea gravel vs generic gravel planning
This page owns pea-gravel-specific quantity, bag and reverse coverage planning. The Gravel Calculator remains the broad material page; the Cubic Yard Calculator provides material-neutral volume and the Rock Calculator serves generic rock. River Rock has a separate quantity/coverage calculator with an optional user-entered size-based depth helper.
Verify product suitability and project installation requirements separately. This quantity tool does not provide landscaping specifications or code/structural design.
Pea gravel calculator FAQ
How much pea gravel do I need?
Use Quantity mode: enter the footprint and your project's uniform depth. The geometric volume is independent of density. Add optional extra only if you need it.
How do I calculate pea gravel coverage?
Use Coverage mode: divide your available material volume by the desired uniform depth. For mass quantity, supply your product density so the calculator can first convert mass to volume.
Can I calculate without knowing density?
Yes. Quantity volume, volume-based bags, volume-priced cost, bulk volume rounding and direct-volume coverage need no density. Weight, mass pricing, weight-based bags and mass-based coverage require it.
How do I estimate tons of pea gravel?
Multiply project volume by your supplier/product density. Imperial results label US short tons; Metric results label metric tonnes. No universal pea-gravel density is supplied.
How does bag quantity work?
Select bag by volume or bag by weight and enter the label's size. Exact bags use project volume or estimated project mass, respectively. Whole bags round upward. Weight-based bags require density; volume-based bags do not.
Why does weight depend on density?
The same volume can correspond to different mass when the supplied product's bulk density varies. Use the density for your actual material rather than treating every pea-gravel product as identical.
What is different from the Gravel Calculator?
This material-specific tool adds reverse coverage from volume or mass, four footprint shapes, and explicit volume/weight bag planning. The Gravel Calculator remains the broad rectangular gravel planning page.