Mass per volume density.
Carats per Teaspoon to Pounds per Cup Converter — ct/tsp to lb/cup
Convert Carat per Teaspoon (ct/tsp) to Pound per Cup (lb/cup) using the exact conversion factor (1 carat per teaspoon = 0.0211643772 pound per cup). See the formula, worked examples, and conversion table.
Carats per Teaspoon 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 40.57682724 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Teaspoon to Pounds per Cup
Carat per Teaspoon 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 = carats per teaspoon × 0.0211643771697
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per teaspoon equals 40.5768272422 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct carat per teaspoon-to-pound per cup factor of 0.0211643771697.
Simple example
1 ct/tsp × 0.02116437717 = 0.0211643772 lb/cup
1 carat per teaspoon = 0.0211643772 pounds per cup.
Real-world example
1,000 ct/tsp × 0.02116437717 = 21.16437717 lb/cup
1,000 carats per teaspoon = 21.16437717 pounds per cup.
Conversion table
| Carat per Teaspoon (ct/tsp) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 ct/tsp | 0.0021164377 lb/cup |
| 1 ct/tsp | 0.0211643772 lb/cup |
| 10 ct/tsp | 0.2116437717 lb/cup |
| 100 ct/tsp | 2.116437717 lb/cup |
| 1,000 ct/tsp | 21.16437717 lb/cup |
| 10,000 ct/tsp | 211.6437717 lb/cup |
Reverse conversion: Pound per Cup to Carat per Teaspoon
0.0211643772 lb/cup × 47.24920521 = 1.000000001 ct/tsp
0.0211643772 pounds per cup = 1.000000001 carats per teaspoon.
carats per teaspoon = pounds per cup × 47.2492052083
For a page dedicated to this direction, see Pound per Cup to Carat per Teaspoon.
Understanding the Carat per Teaspoon (ct/tsp)
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 carat per teaspoon?
1 carat per teaspoon equals 0.0211643772 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert carat per teaspoon to pound per cup?
Multiply the carat per teaspoon value by 0.02116437717. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to carat per teaspoon?
Use the reverse factor: 1 pound per cup equals 47.24920521 carats per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per teaspoon?
Carat per Teaspoon (ct/tsp) is a unit of density.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the carat per teaspoon to pound per cup conversion exact?
Yes. Both carat per teaspoon and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.02116437717 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.