Mass per volume density.
Stones per Cup to Pounds per Teaspoon Converter — st/cup to lb/tsp
Convert Stone per Cup (st/cup) to Pound per Teaspoon (lb/tsp) using the exact conversion factor (1 stone per cup = 0.2916666667 pound per teaspoon). See the formula, worked examples, and conversion table.
Stones per Cup to Pounds 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 26841.11972 / 92026.69618.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cup to Pounds per Teaspoon
Stone per Cup and Pound 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. Both are mass per volume density units.
Formula
pounds per teaspoon = stones per cup × 0.291666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cup equals 26841.119719 base units, and 1 pound per teaspoon equals 92026.6961794 base units, so dividing one by the other gives the direct stone per cup-to-pound per teaspoon factor of 0.291666666667.
Simple example
1 st/cup × 0.2916666667 = 0.2916666667 lb/tsp
1 stone per cup = 0.2916666667 pounds per teaspoon.
Real-world example
1,000 st/cup × 0.2916666667 = 291.6666667 lb/tsp
1,000 stones per cup = 291.6666667 pounds per teaspoon.
Conversion table
| Stone per Cup (st/cup) | Pound per Teaspoon (lb/tsp) |
|---|---|
| 0.1 st/cup | 0.0291666667 lb/tsp |
| 1 st/cup | 0.2916666667 lb/tsp |
| 10 st/cup | 2.916666667 lb/tsp |
| 100 st/cup | 29.16666667 lb/tsp |
| 1,000 st/cup | 291.6666667 lb/tsp |
| 10,000 st/cup | 2,916.666667 lb/tsp |
Reverse conversion: Pound per Teaspoon to Stone per Cup
0.2916666667 lb/tsp × 3.428571429 = 1 st/cup
0.2916666667 pounds per teaspoon = 1 stones per cup.
stones per cup = pounds per teaspoon × 3.42857142857
For a page dedicated to this direction, see Pound per Teaspoon to Stone per Cup.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Understanding the Pound per Teaspoon (lb/tsp)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per teaspoon are in 1 stone per cup?
1 stone per cup equals 0.2916666667 pounds per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to pound per teaspoon?
Multiply the stone per cup value by 0.2916666667. The converter above does this instantly to whatever precision you set.
How do I convert pound per teaspoon back to stone per cup?
Use the reverse factor: 1 pound per teaspoon equals 3.428571429 stones per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
What is a pound per teaspoon?
Pound per Teaspoon (lb/tsp) is a unit of density.
Is the stone per cup to pound per teaspoon conversion exact?
Yes. Both stone per cup and pound per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 0.2916666667 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.