Mass per volume density.
Pounds per Teaspoon to Kilograms per Cup Converter — lb/tsp to kg/cup
Convert Pound per Teaspoon (lb/tsp) to Kilogram per Cup (kg/cup) using the exact conversion factor (1 pound per teaspoon = 21.77243376 kilogram per cup). See the formula, worked examples, and conversion table.
Pounds per Teaspoon to Kilograms 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 92026.69618 / 4226.752838.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Teaspoon to Kilograms per Cup
Pound per Teaspoon and Kilogram 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
kilograms per cup = pounds per teaspoon × 21.77243376
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per teaspoon equals 92026.6961794 base units, and 1 kilogram per cup equals 4226.75283773 base units, so dividing one by the other gives the direct pound per teaspoon-to-kilogram per cup factor of 21.77243376.
Simple example
1 lb/tsp × 21.77243376 = 21.77243376 kg/cup
1 pound per teaspoon = 21.77243376 kilograms per cup.
Real-world example
1,000 lb/tsp × 21.77243376 = 21,772.43376 kg/cup
1,000 pounds per teaspoon = 21,772.43376 kilograms per cup.
Conversion table
| Pound per Teaspoon (lb/tsp) | Kilogram per Cup (kg/cup) |
|---|---|
| 0.1 lb/tsp | 2.177243376 kg/cup |
| 1 lb/tsp | 21.77243376 kg/cup |
| 10 lb/tsp | 217.7243376 kg/cup |
| 100 lb/tsp | 2,177.243376 kg/cup |
| 1,000 lb/tsp | 21,772.43376 kg/cup |
| 10,000 lb/tsp | 217,724.3376 kg/cup |
Reverse conversion: Kilogram per Cup to Pound per Teaspoon
21.77243376 kg/cup × 0.04592963796 = 1 lb/tsp
21.77243376 kilograms per cup = 1 pounds per teaspoon.
pounds per teaspoon = kilograms per cup × 0.0459296379552
For a page dedicated to this direction, see Kilogram per Cup to Pound per Teaspoon.
Understanding the Pound per Teaspoon (lb/tsp)
Mass per volume density.
Understanding the Kilogram per Cup (kg/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cup are in 1 pound per teaspoon?
1 pound per teaspoon equals 21.77243376 kilograms per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per teaspoon to kilogram per cup?
Multiply the pound per teaspoon value by 21.77243376. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cup back to pound per teaspoon?
Use the reverse factor: 1 kilogram per cup equals 0.045929638 pounds per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per teaspoon?
Pound per Teaspoon (lb/tsp) is a unit of density.
What is a kilogram per cup?
Kilogram per Cup (kg/cup) is a unit of density.
Is the pound per teaspoon to kilogram per cup conversion exact?
Yes. Both pound per teaspoon and kilogram per cup are defined by fixed standards rather than physical artifacts, so the factor of 21.77243376 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.