Convert lb/yd³ to lb/ft³ Instantly
Use this Pounds per Cubic Yard to Pounds per Cubic Foot converter to change density from lb/yd³ to lb/ft³. One cubic yard contains exactly 27 cubic feet, so the same material density is converted by dividing the pounds-per-cubic-yard value by 27.
Convert lb/yd³ to lb/ft³, reverse the conversion, estimate total material weight from density and volume, or translate one density across common U.S. and metric units.
Enter pounds per cubic yard. The calculator divides by exactly 27 and also shows metric and short-ton equivalents.
Enter zero or any positive decimal value.
Reverse the conversion by multiplying pounds per cubic foot by exactly 27.
Multiply bulk density in lb/yd³ by project volume in yd³ to estimate total pounds, short tons and kilograms.
Convert one density value across lb/yd³, lb/ft³, kg/m³ and U.S. short tons per cubic yard.
The Pounds per Cubic Yard to Pounds per Cubic Foot conversion changes the volume unit in the denominator while leaving pounds as the mass unit. Since one linear yard is exactly three feet, one cubic yard contains 3 × 3 × 3, or exactly 27 cubic feet. The same mass that is assigned to one cubic yard must therefore be distributed across 27 cubic-foot units.
Example: 2,700 lb/yd³ ÷ 27 = 100 lb/ft³.
For example, a bulk density of 3,240 lb/yd³ converts to 120 lb/ft³ because 3,240 divided by 27 equals 120. Nothing about the material itself has changed. Only the volume basis used to express the same density has changed.
One cubic yard contains exactly 27 cubic feet, not three cubic feet.
Use lb/ft³ = lb/yd³ ÷ 27 for the main conversion.
Multiply lb/ft³ by 27 to return to pounds per cubic yard.
The physical material density stays the same; only its numerical representation changes.
Use this lb/yd³ to lb/ft³ conversion chart for common values. The table also includes kilograms per cubic meter and U.S. short tons per cubic yard to make cross-checking easier.
| Pounds per Cubic Yard | Pounds per Cubic Foot | Kilograms per Cubic Meter | Short Tons per Cubic Yard |
|---|---|---|---|
| 1 lb/yd³ | 0.037037 lb/ft³ | 0.5933 kg/m³ | 0.000500 short t/yd³ |
| 10 lb/yd³ | 0.370370 lb/ft³ | 5.9328 kg/m³ | 0.005000 short t/yd³ |
| 25 lb/yd³ | 0.925926 lb/ft³ | 14.8319 kg/m³ | 0.012500 short t/yd³ |
| 50 lb/yd³ | 1.851852 lb/ft³ | 29.6638 kg/m³ | 0.025000 short t/yd³ |
| 100 lb/yd³ | 3.703704 lb/ft³ | 59.3276 kg/m³ | 0.050000 short t/yd³ |
| 250 lb/yd³ | 9.259259 lb/ft³ | 148.3191 kg/m³ | 0.125000 short t/yd³ |
| 500 lb/yd³ | 18.518519 lb/ft³ | 296.6382 kg/m³ | 0.250000 short t/yd³ |
| 750 lb/yd³ | 27.777778 lb/ft³ | 444.9573 kg/m³ | 0.375000 short t/yd³ |
| 1,000 lb/yd³ | 37.037037 lb/ft³ | 593.2764 kg/m³ | 0.500000 short t/yd³ |
| 1,500 lb/yd³ | 55.555556 lb/ft³ | 889.9146 kg/m³ | 0.750000 short t/yd³ |
| 2,000 lb/yd³ | 74.074074 lb/ft³ | 1,186.5528 kg/m³ | 1.000000 short t/yd³ |
| 2,500 lb/yd³ | 92.592593 lb/ft³ | 1,483.1911 kg/m³ | 1.250000 short t/yd³ |
| 2,700 lb/yd³ | 100.000000 lb/ft³ | 1,601.8463 kg/m³ | 1.350000 short t/yd³ |
| 3,000 lb/yd³ | 111.111111 lb/ft³ | 1,779.8293 kg/m³ | 1.500000 short t/yd³ |
| 3,500 lb/yd³ | 129.629630 lb/ft³ | 2,076.4675 kg/m³ | 1.750000 short t/yd³ |
| 4,000 lb/yd³ | 148.148148 lb/ft³ | 2,373.1057 kg/m³ | 2.000000 short t/yd³ |
| 4,500 lb/yd³ | 166.666667 lb/ft³ | 2,669.7439 kg/m³ | 2.250000 short t/yd³ |
| 5,000 lb/yd³ | 185.185185 lb/ft³ | 2,966.3821 kg/m³ | 2.500000 short t/yd³ |
These examples show why the factor of 27 is convenient. Whenever the pounds-per-cubic-yard value is a multiple of 27, the pounds-per-cubic-foot result is a whole number.
1,350 ÷ 27 = 50 lb/ft³.
2,160 ÷ 27 = 80 lb/ft³.
2,700 ÷ 27 = 100 lb/ft³.
3,240 ÷ 27 = 120 lb/ft³.
4,050 ÷ 27 = 150 lb/ft³.
A yard is exactly three feet long. Volume, however, uses three dimensions: length, width and height. A cube measuring one yard on every side therefore measures three feet by three feet by three feet. Multiplying those dimensions gives 27 cubic feet.
This exact geometric relationship is the reason the density conversion factor is exactly 27.
This point is where many manual conversions go wrong. Dividing by three only changes a linear dimension. Density expressed per cubic foot requires the full three-dimensional volume conversion. Because the numerator remains pounds in both units, there is no separate mass conversion in the primary calculation.
Pounds per cubic yard is a mass-per-volume expression. A material listed at 2,700 lb/yd³ has 2,700 pounds of mass associated with each cubic yard at the material condition represented by that density. The value may describe compacted aggregate, soil, concrete, loose fill or another bulk material, but the number is meaningful only when the material condition is understood.
Bulk density can vary with moisture content, compaction, particle grading, air voids and how the sample was measured. For that reason, the conversion tool does not assume a particular material. It converts the numerical density you provide. If you are estimating a job, use a published or measured density appropriate for the exact material and condition instead of relying on a generic value.
Pounds per cubic foot expresses the same idea on a smaller volume basis. A value of 100 lb/ft³ means that each cubic foot of material corresponds to 100 pounds of mass under the stated condition. Since there are 27 cubic feet in one cubic yard, that same density is 2,700 lb/yd³.
Engineering references, building specifications, material data sheets and geotechnical reports often use lb/ft³ because cubic feet are convenient for local calculations. Material suppliers and site estimators may also use lb/yd³ or tons per cubic yard when quantities are handled in cubic yards. Being able to switch accurately between the two helps keep calculations consistent.
The reverse conversion uses multiplication rather than division. Every one cubic yard contains 27 cubic feet, so multiply the pounds-per-cubic-foot density by 27.
Example: 145 lb/ft³ × 27 = 3,915 lb/yd³.
You can perform this reverse calculation with the second calculator tab above. The reverse tool also reports a metric equivalent so you can compare a U.S. customary density with kg/m³ without running a second manual calculation.
For metric work, one pound per cubic yard is approximately 0.5932764213 kilograms per cubic meter. This factor comes from the exact definitions of the international pound and yard.
Example: 2,700 lb/yd³ × 0.5932764213 ≈ 1,601.846 kg/m³.
Likewise, one pound per cubic foot is approximately 16.01846337 kg/m³. The multi-unit converter above uses these relationships to translate a single density value between lb/yd³, lb/ft³, kg/m³ and U.S. short tons per cubic yard.
Density is not the same as total project weight. To estimate total mass, multiply the density by the matching volume. If density is in lb/yd³, volume must be in yd³ for a direct pounds result.
Example: 2,700 lb/yd³ × 8 yd³ = 21,600 lb, or 10.8 U.S. short tons.
The third calculator tab is designed for that workflow. It keeps the volume basis consistent, then also converts the total to short tons and kilograms. For purchasing, trucking or structural work, always distinguish between an estimated bulk density and a verified delivered or design value.
Yards to feet is a linear conversion. Cubic yards to cubic feet requires 3³ = 27.
Going from lb/yd³ to lb/ft³ makes the number smaller, so divide by 27.
lb/yd³ is not the same as total pounds unless the volume is exactly one cubic yard.
Moisture and compaction can change real bulk density even though the unit conversion itself is exact.
Keep extra digits during intermediate calculations and round the final value as needed.
The pounds-per-cubic-yard to pounds-per-cubic-foot conversion appears in construction estimating, civil engineering, landscaping, geotechnical work, material handling and bulk commodity calculations. One source may provide density in lb/yd³ while another formula expects lb/ft³. Converting the unit first prevents a hidden factor-of-27 error from propagating through a weight, load or quantity calculation.
The geometric factor between cubic yards and cubic feet is exact: one cubic yard equals exactly 27 cubic feet. Any uncertainty in the final converted density therefore comes from the source density, not from the 27 factor. If your source value is an estimate such as “about 2,700 lb/yd³,” reporting a long string of decimal places in lb/ft³ does not create more real accuracy.
For everyday estimating, one or two decimal places may be enough. For engineering or laboratory calculations, follow the precision requirements of the relevant specification and retain additional digits through intermediate steps. The calculator displays enough precision for checking while avoiding unnecessarily long numbers.
Continue with the Pounds per Cubic Foot to Pounds per Cubic Yard reverse converter, the Pounds per Cubic Yard to Kilograms per Cubic Meter converter, or the Pounds per Cubic Foot to Kilograms per Cubic Meter page. For the metric-to-U.S. direction, use Kilograms per Cubic Meter to Pounds per Cubic Yard. If your source value is in tons per cubic yard, the Tons per Cubic Yard to Pounds per Cubic Yard tool can convert the mass unit first.
For standards-based background on U.S. customary and SI unit conversions, consult the NIST Office of Weights and Measures unit conversion resources. For the International System of Units and SI definitions, see the BIPM SI Brochure. Project specifications, laboratory reports and manufacturer data remain the controlling sources for the actual density assigned to a specific material.
The same cubic yard is divided into 27 equal cubic-foot volumes, so the per-cubic-foot numerical density is one twenty-seventh of the per-cubic-yard value.
Quick answers about lb/yd³, lb/ft³, the exact factor of 27, reverse conversion, density and project weight.