Mass per volume density.
Stones per Teaspoon to Pounds per Cubic yard Converter — st/tsp to lb/yd3
Convert Stone per Teaspoon (st/tsp) to Pound per Cubic yard (lb/yd3) using the exact conversion factor (1 stone per teaspoon = 2,171,624.727 pound per cubic yard). See the formula, worked examples, and conversion table.
Stones per Teaspoon to Pounds per Cubic yard converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 1.28837375e+6 / 0.5932764213.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Teaspoon to Pounds per Cubic yard
Stone per Teaspoon and Pound per Cubic yard both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
pounds per cubic yard = stones per teaspoon × 2171624.72727
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per teaspoon equals 1288373.74651 base units, and 1 pound per cubic yard equals 0.593276421258 base units, so dividing one by the other gives the direct stone per teaspoon-to-pound per cubic yard factor of 2171624.72727.
Simple example
1 st/tsp × 2171624.727 = 2,171,624.727 lb/yd3
1 stone per teaspoon = 2,171,624.727 pounds per cubic yard.
Real-world example
1,000 st/tsp × 2171624.727 = 2,171,624,727 lb/yd3
1,000 stones per teaspoon = 2,171,624,727 pounds per cubic yard.
Conversion table
| Stone per Teaspoon (st/tsp) | Pound per Cubic yard (lb/yd3) |
|---|---|
| 0.1 st/tsp | 217,162.4727 lb/yd3 |
| 1 st/tsp | 2,171,624.727 lb/yd3 |
| 10 st/tsp | 21,716,247.27 lb/yd3 |
| 100 st/tsp | 217,162,472.7 lb/yd3 |
| 1,000 st/tsp | 2,171,624,727 lb/yd3 |
| 10,000 st/tsp | 21,716,247,270 lb/yd3 |
Reverse conversion: Pound per Cubic yard to Stone per Teaspoon
1 lb/yd3 × 4.604847e-7 = 4.604847e-7 st/tsp
1 pound per cubic yard = 4.604847e-7 stones per teaspoon.
stones per teaspoon = pounds per cubic yard × 4.604847e-7
For a page dedicated to this direction, see Pound per Cubic yard to Stone per Teaspoon.
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
Understanding the Pound per Cubic yard (lb/yd3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cubic yard are in 1 stone per teaspoon?
1 stone per teaspoon equals 2,171,624.727 pounds per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert stone per teaspoon to pound per cubic yard?
Multiply the stone per teaspoon value by 2171624.727. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic yard back to stone per teaspoon?
Use the reverse factor: 1 pound per cubic yard equals 4.604847e-7 stones per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per teaspoon?
Stone per Teaspoon (st/tsp) is a unit of density.
What is a pound per cubic yard?
Pound per Cubic yard (lb/yd3) is a unit of density.
Is the stone per teaspoon to pound per cubic yard conversion exact?
Yes. Both stone per teaspoon and pound per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 2171624.727 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.