Mass per volume density.
Stones per Teaspoon to Pound per Cubic inches Converter — st/tsp to lb/in3
Convert Stone per Teaspoon (st/tsp) to Pound per Cubic inch (lb/in3) using the exact conversion factor (1 stone per teaspoon = 46.54545455 pound per cubic inch). See the formula, worked examples, conversion table, and common uses.
Stones per Teaspoon to Pound per Cubic inches 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 / 27679.90471.
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 Pound per Cubic inches
Stone per Teaspoon and Pound per Cubic inch 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
pound per cubic inches = stones per teaspoon × 46.5454545455
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 inch equals 27679.9047102 base units, so dividing one by the other gives the direct stone per teaspoon-to-pound per cubic inch factor of 46.5454545455.
Simple example
1 st/tsp × 46.54545455 = 46.54545455 lb/in3
1 stone per teaspoon = 46.54545455 pound per cubic inches.
Real-world example
1,000 st/tsp × 46.54545455 = 46,545.45455 lb/in3
1,000 stones per teaspoon = 46,545.45455 pound per cubic inches.
Conversion table
| Stone per Teaspoon (st/tsp) | Pound per Cubic inch (lb/in3) |
|---|---|
| 0.1 st/tsp | 4.654545455 lb/in3 |
| 1 st/tsp | 46.54545455 lb/in3 |
| 10 st/tsp | 465.4545455 lb/in3 |
| 100 st/tsp | 4,654.545455 lb/in3 |
| 1,000 st/tsp | 46,545.45455 lb/in3 |
| 10,000 st/tsp | 465,454.5455 lb/in3 |
Reverse conversion: Pound per Cubic inch to Stone per Teaspoon
46.54545455 lb/in3 × 0.021484375 = 1 st/tsp
46.54545455 pound per cubic inches = 1 stones per teaspoon.
stones per teaspoon = pound per cubic inches × 0.021484375
For a page dedicated to this direction, see Pound per Cubic inch to Stone per Teaspoon.
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pound per cubic inches are in 1 stone per teaspoon?
1 stone per teaspoon equals 46.54545455 pound per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert stone per teaspoon to pound per cubic inch?
Multiply the stone per teaspoon value by 46.54545455. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic inch back to stone per teaspoon?
Use the reverse factor: 1 pound per cubic inch equals 0.021484375 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 inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Is the stone per teaspoon to pound per cubic inch conversion exact?
Yes. Both stone per teaspoon and pound per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 46.54545455 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.