Mass per volume density.
Stones per Liter to Pounds per Cup Converter — st/L to lb/cup
Convert Stone per Liter (st/L) to Pound per Cup (lb/cup) using the exact conversion factor (1 stone per liter = 3.312235311 pound per cup). See the formula, worked examples, and conversion table.
Stones per Liter to Pounds per Cup 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 6350.29318 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Liter to Pounds per Cup
Stone per Liter and Pound per Cup 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 cup = stones per liter × 3.312235311
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per liter equals 6350.29318 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct stone per liter-to-pound per cup factor of 3.312235311.
Simple example
1 st/L × 3.312235311 = 3.312235311 lb/cup
1 stone per liter = 3.312235311 pounds per cup.
Real-world example
1,000 st/L × 3.312235311 = 3,312.235311 lb/cup
1,000 stones per liter = 3,312.235311 pounds per cup.
Conversion table
| Stone per Liter (st/L) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 st/L | 0.3312235311 lb/cup |
| 1 st/L | 3.312235311 lb/cup |
| 10 st/L | 33.12235311 lb/cup |
| 100 st/L | 331.2235311 lb/cup |
| 1,000 st/L | 3,312.235311 lb/cup |
| 10,000 st/L | 33,122.35311 lb/cup |
Reverse conversion: Pound per Cup to Stone per Liter
3.312235311 lb/cup × 0.301910917 = 1 st/L
3.312235311 pounds per cup = 1 stones per liter.
stones per liter = pounds per cup × 0.301910916981
For a page dedicated to this direction, see Pound per Cup to Stone per Liter.
Understanding the Stone per Liter (st/L)
Mass per volume density.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cup are in 1 stone per liter?
1 stone per liter equals 3.312235311 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per liter to pound per cup?
Multiply the stone per liter value by 3.312235311. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to stone per liter?
Use the reverse factor: 1 pound per cup equals 0.301910917 stones per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per liter?
Stone per Liter (st/L) is a unit of density.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the stone per liter to pound per cup conversion exact?
Yes. Both stone per liter and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 3.312235311 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.