Mass per volume density.
Pound per Cubic inches to Grains per Teaspoon Converter — lb/in3 to gr/tsp
Convert Pound per Cubic inch (lb/in3) to Grain per Teaspoon (gr/tsp) using the exact conversion factor (1 pound per cubic inch = 2,105.46875 grain per teaspoon). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Grains 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 / 13.14667088.
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 Grains per Teaspoon
Pound per Cubic inch and Grain 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
grains per teaspoon = pound per cubic inches × 2105.46875
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 grain per teaspoon equals 13.1466708828 base units, so dividing one by the other gives the direct pound per cubic inch-to-grain per teaspoon factor of 2105.46875.
Simple example
1 lb/in3 × 2105.46875 = 2,105.46875 gr/tsp
1 pound per cubic inch = 2,105.46875 grains per teaspoon.
Real-world example
1,000 lb/in3 × 2105.46875 = 2,105,468.75 gr/tsp
1,000 pound per cubic inches = 2,105,468.75 grains per teaspoon.
Conversion table
| Pound per Cubic inch (lb/in3) | Grain per Teaspoon (gr/tsp) |
|---|---|
| 0.1 lb/in3 | 210.546875 gr/tsp |
| 1 lb/in3 | 2,105.46875 gr/tsp |
| 10 lb/in3 | 21,054.6875 gr/tsp |
| 100 lb/in3 | 210,546.875 gr/tsp |
| 1,000 lb/in3 | 2,105,468.75 gr/tsp |
| 10,000 lb/in3 | 21,054,687.5 gr/tsp |
Reverse conversion: Grain per Teaspoon to Pound per Cubic inch
1 gr/tsp × 0.0004749536178 = 0.0004749536 lb/in3
1 grain per teaspoon = 0.0004749536 pound per cubic inches.
pound per cubic inches = grains per teaspoon × 0.000474953617811
For a page dedicated to this direction, see Grain 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 Grain per Teaspoon (gr/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 grains per teaspoon are in 1 pound per cubic inch?
1 pound per cubic inch equals 2,105.46875 grains per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to grain per teaspoon?
Multiply the pound per cubic inch value by 2105.46875. The converter above does this instantly to whatever precision you set.
How do I convert grain per teaspoon back to pound per cubic inch?
Use the reverse factor: 1 grain per teaspoon equals 0.0004749536 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 grain per teaspoon?
Grain per Teaspoon (gr/tsp) is a unit of density.
Is the pound per cubic inch to grain per teaspoon conversion exact?
Yes. Both pound per cubic inch and grain per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 2105.46875 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.