About Cubic Yardly

Cubic Yardly maintains the calculators and explanations on this website under the Cubic Yardly brand. Questions about the site, a calculation, or this project can be sent to [email protected].

The calculation notes below explain the formulas, published references, and software checks behind each result. Product examples identify their manufacturer. Cost examples are labeled as illustrative and use editable inputs rather than a claimed market price.

Cubic Yardly is a collection of free volume, area, and material quantity tools. It helps turn a measured space into cubic yards, compare units, and understand how density, depth, bag yield, or a supplier quote changes an estimate.

The main calculator handles mixed units, several shapes, and multiple areas. Supporting tools focus on tasks such as soil for a raised bed, concrete bags, trailer volume, ground coverage, and density based weight conversions.

• Measurements and their units stay visible.
• Measured volume is separated from ordering allowances and rounding.
• Material density, local prices, and project specific volume factors come from your inputs.
• Calculation explanations, worked examples, and source references are available alongside the tools.
• Diagrams explain geometry and disclose illustrative footprints when the inputs do not determine a unique shape.

The calculation code uses consistent internal units and keeps precision until display or an explicit ordering step. Automated checks cover unit relationships, shapes, material ordering, inverse conversions, and diagram proportions. The notes below explain the formulas and important limits.

The site does not claim that an engineer has inspected your project or that a calculator chooses the right material specification. A quantity estimate is one part of planning. Verify measurements and supplier information before ordering.

The notes below explain the formulas, exact unit relationships, ordering rules, and diagrams used across the calculators. Each tool also shows the method for the calculation on that page.

Length measurements are converted to feet. The footprint area is calculated in square feet, multiplied by depth in feet, and divided by 27 for cubic yards. Multiple areas are summed before an ordering allowance is applied.

• Rectangle: length × width.
• Circle: π × radius². A radius input is distinguished from a diameter.
• Triangle: base × perpendicular height ÷ 2, or Heron’s formula for three valid side lengths.
• Trapezoid: average of the two parallel sides × perpendicular height.
• Ring: outer circle area less inner circle area.
• Known area: the stated area converted to square feet.

The earthwork berm tool uses a triangular or trapezoid cross section multiplied by length. It assumes that cross section is constant. Trench backfill can deduct a user entered displaced volume.

The international foot is exactly 0.3048 meters. A cubic yard is exactly 27 cubic feet, 46,656 cubic inches, and 0.764554857984 cubic meters. A square yard is exactly 9 square feet. An acre is 43,560 square feet.

US liquid gallons use 231 cubic inches per gallon. Imperial gallons use 4.54609 liters. US liquid quarts, imperial quarts, and US dry quarts are labeled separately. A volume equivalent in gallons does not calculate water content or concrete mixing water.

US short tons contain 2,000 pounds, metric tonnes contain 1,000 kilograms, and long tons contain 2,240 pounds. Weight conversions require a bulk density that matches the material and condition.

On the main and material calculators, an optional extra percentage is applied after the measured volumes are added. If selected, a supplier order increment then rounds that quantity up. Bag and load counts use the planned quantity and round up separately to whole counts.

Calculated values retain precision internally. Values displayed in a paragraph, step, or table may be rounded. Reentering a rounded output can slightly alter a reverse calculation. Very small volume conversions use significant digits so they are not immediately displayed as zero.

Earthwork starts with measured geometric volume and no material state assigned. Choose the measured state before converting or pricing. Bank, loose, and compacted conversions use your desired volume divided by measured volume ratio. A density based compaction test percentage is not used as a volume shrink percentage. The engine does not assume material densities, a national price, a universal compaction factor, or an extra allowance.

The main shape diagrams preserve relative dimensions within the displayed view. Each area has its own preview. A known area is illustrated as a square because area alone does not establish a footprint. Base and height triangles and parallel side trapezoids are drawn centered because those inputs do not specify side offsets.

The size comparisons draw one cubic yard and the selected cubic yard quantity at the same physical scale. An equivalent cube edge is the cube root of the cubic foot volume. These are geometry illustrations, not predictions of a loose pile, truck body, or material surface.

Development and drafting use AI assistance. The calculation methods are checked against published measurement standards, worked examples, and automated software tests. The site does not attribute this work to an invented expert or claim that a professional has inspected an individual project.

Product yields are attributed to their published manufacturer sources. Illustrative cost examples demonstrate arithmetic and are not supplier quotes. Confirm your current packaging, product specifications, and local quote before ordering.

Automated tests exercise mixed units, fractions, shape geometry, conversion direction, discrete ordering counts, density, payload comparison, earthwork state ratios, small values, and invalid inputs. Source and build checks also verify page links, canonical URLs, indexing configuration, visible punctuation, and required assets.

The results depend on the measurements and assumptions entered. Variable depths, irregular excavation, tapered containers, material settling, supplier measurement methods, and project specifications can require a more detailed model. Vehicle weight ratings and structural design are separate from a volume calculation.

To report a reproducible issue, email [email protected].

If an example seems wrong, a result is unclear, or a tool would be more useful with a different explanation, email [email protected]. Include the page and the measurements with units so the issue can be reproduced.

Read the calculation methodology or see what to include in a correction request.