Mass per volume density.
Pound per Cubic inches to Stones per Teaspoon Converter — lb/in3 to st/tsp
Convert Pound per Cubic inch (lb/in3) to Stone per Teaspoon (st/tsp) using the exact conversion factor (1 pound per cubic inch = 0.021484375 stone per teaspoon). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Stones per Teaspoon 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 27679.90471 / 1.28837375e+6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Stones per Teaspoon
Pound per Cubic inch and Stone per Teaspoon 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. Pound per Cubic inch is most often used for 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.
Formula
stones per teaspoon = pound per cubic inches × 0.021484375
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 stone per teaspoon equals 1288373.74651 base units, so dividing one by the other gives the direct pound per cubic inch-to-stone per teaspoon factor of 0.021484375.
Simple example
1 lb/in3 × 0.021484375 = 0.021484375 st/tsp
1 pound per cubic inch = 0.021484375 stones per teaspoon.
Real-world example
1,000 lb/in3 × 0.021484375 = 21.484375 st/tsp
1,000 pound per cubic inches = 21.484375 stones per teaspoon.
Conversion table
| Pound per Cubic inch (lb/in3) | Stone per Teaspoon (st/tsp) |
|---|---|
| 0.1 lb/in3 | 0.0021484375 st/tsp |
| 1 lb/in3 | 0.021484375 st/tsp |
| 10 lb/in3 | 0.21484375 st/tsp |
| 100 lb/in3 | 2.1484375 st/tsp |
| 1,000 lb/in3 | 21.484375 st/tsp |
| 10,000 lb/in3 | 214.84375 st/tsp |
Reverse conversion: Stone per Teaspoon to Pound per Cubic inch
0.021484375 st/tsp × 46.54545455 = 1 lb/in3
0.021484375 stones per teaspoon = 1 pound per cubic inches.
pound per cubic inches = stones per teaspoon × 46.5454545455
For a page dedicated to this direction, see Stone per Teaspoon to Pound per Cubic inch.
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
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
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 stones per teaspoon are in 1 pound per cubic inch?
1 pound per cubic inch equals 0.021484375 stones per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to stone per teaspoon?
Multiply the pound per cubic inch value by 0.021484375. The converter above does this instantly to whatever precision you set.
How do I convert stone per teaspoon back to pound per cubic inch?
Use the reverse factor: 1 stone per teaspoon equals 46.54545455 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a stone per teaspoon?
Stone per Teaspoon (st/tsp) is a unit of density.
Is the pound per cubic inch to stone per teaspoon conversion exact?
Yes. Both pound per cubic inch and stone per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 0.021484375 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
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.