Mass per volume density.
Carats per Teaspoon to Grains per Fluid ounce Converter — ct/tsp to gr/fl oz
Convert Carat per Teaspoon (ct/tsp) to Grain per Fluid ounce (gr/fl oz) using the exact conversion factor (1 carat per teaspoon = 18.51883002 grain per fluid ounce). See the formula, worked examples, and conversion table.
Carats per Teaspoon to Grains per Fluid ounce 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 / 2.191111814.
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 Grains per Fluid ounce
Carat per Teaspoon and Grain per Fluid ounce 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
grains per fluid ounce = carats per teaspoon × 18.5188300235
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 grain per fluid ounce equals 2.19111181379 base units, so dividing one by the other gives the direct carat per teaspoon-to-grain per fluid ounce factor of 18.5188300235.
Simple example
1 ct/tsp × 18.51883002 = 18.51883002 gr/fl oz
1 carat per teaspoon = 18.51883002 grains per fluid ounce.
Real-world example
1,000 ct/tsp × 18.51883002 = 18,518.83002 gr/fl oz
1,000 carats per teaspoon = 18,518.83002 grains per fluid ounce.
Conversion table
| Carat per Teaspoon (ct/tsp) | Grain per Fluid ounce (gr/fl oz) |
|---|---|
| 0.1 ct/tsp | 1.851883002 gr/fl oz |
| 1 ct/tsp | 18.51883002 gr/fl oz |
| 10 ct/tsp | 185.1883002 gr/fl oz |
| 100 ct/tsp | 1,851.883002 gr/fl oz |
| 1,000 ct/tsp | 18,518.83002 gr/fl oz |
| 10,000 ct/tsp | 185,188.3002 gr/fl oz |
Reverse conversion: Grain per Fluid ounce to Carat per Teaspoon
18.51883002 gr/fl oz × 0.05399909167 = 0.9999999998 ct/tsp
18.51883002 grains per fluid ounce = 0.9999999998 carats per teaspoon.
carats per teaspoon = grains per fluid ounce × 0.0539990916667
For a page dedicated to this direction, see Grain per Fluid ounce to Carat per Teaspoon.
Understanding the Carat per Teaspoon (ct/tsp)
Mass per volume density.
Understanding the Grain per Fluid ounce (gr/fl oz)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per fluid ounce are in 1 carat per teaspoon?
1 carat per teaspoon equals 18.51883002 grains per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert carat per teaspoon to grain per fluid ounce?
Multiply the carat per teaspoon value by 18.51883002. The converter above does this instantly to whatever precision you set.
How do I convert grain per fluid ounce back to carat per teaspoon?
Use the reverse factor: 1 grain per fluid ounce equals 0.0539990917 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 grain per fluid ounce?
Grain per Fluid ounce (gr/fl oz) is a unit of density.
Is the carat per teaspoon to grain per fluid ounce conversion exact?
Yes. Both carat per teaspoon and grain per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 18.51883002 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.