Mass per volume density.
Stones per Teaspoon to Grams per Cubic Millimeter Converter — st/tsp to g/mm3
Convert Stone per Teaspoon (st/tsp) to Gram per Cubic Millimeter (g/mm3) using the exact conversion factor (1 stone per teaspoon = 1.288373747 gram per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Teaspoon to Grams per Cubic Millimeter 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 / 1e+6.
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 Grams per Cubic Millimeter
Stone per Teaspoon and Gram per Cubic Millimeter 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
grams per cubic millimeter = stones per teaspoon × 1.28837374651
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 gram per cubic millimeter equals 1000000 base units, so dividing one by the other gives the direct stone per teaspoon-to-gram per cubic millimeter factor of 1.28837374651.
Simple example
1 st/tsp × 1.288373747 = 1.288373747 g/mm3
1 stone per teaspoon = 1.288373747 grams per cubic millimeter.
Real-world example
1,000 st/tsp × 1.288373747 = 1,288.373747 g/mm3
1,000 stones per teaspoon = 1,288.373747 grams per cubic millimeter.
Conversion table
| Stone per Teaspoon (st/tsp) | Gram per Cubic Millimeter (g/mm3) |
|---|---|
| 0.1 st/tsp | 0.1288373747 g/mm3 |
| 1 st/tsp | 1.288373747 g/mm3 |
| 10 st/tsp | 12.88373747 g/mm3 |
| 100 st/tsp | 128.8373747 g/mm3 |
| 1,000 st/tsp | 1,288.373747 g/mm3 |
| 10,000 st/tsp | 12,883.73747 g/mm3 |
Reverse conversion: Gram per Cubic Millimeter to Stone per Teaspoon
1.288373747 g/mm3 × 0.7761722891 = 1 st/tsp
1.288373747 grams per cubic millimeter = 1 stones per teaspoon.
stones per teaspoon = grams per cubic millimeter × 0.776172289064
For a page dedicated to this direction, see Gram per Cubic Millimeter to Stone per Teaspoon.
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
Understanding the Gram per Cubic Millimeter (g/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cubic millimeter are in 1 stone per teaspoon?
1 stone per teaspoon equals 1.288373747 grams per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per teaspoon to gram per cubic millimeter?
Multiply the stone per teaspoon value by 1.288373747. The converter above does this instantly to whatever precision you set.
How do I convert gram per cubic millimeter back to stone per teaspoon?
Use the reverse factor: 1 gram per cubic millimeter equals 0.7761722891 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 gram per cubic millimeter?
Gram per Cubic Millimeter (g/mm3) is a unit of density.
Is the stone per teaspoon to gram per cubic millimeter conversion exact?
Yes. Both stone per teaspoon and gram per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 1.288373747 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.