Mass per volume density.
Ounces per Fluid ounce to Drams per Teaspoon Converter — oz/fl oz to dr/tsp
Convert Ounce per Fluid ounce (oz/fl oz) to Dram per Teaspoon (dr/tsp) using the exact conversion factor (1 ounce per fluid ounce = 2.666666667 dram per teaspoon). See the formula, worked examples, and conversion table.
Ounces per Fluid ounce to Drams 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 958.6114185 / 359.479282.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Fluid ounce to Drams per Teaspoon
Ounce per Fluid ounce and Dram 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
drams per teaspoon = ounces per fluid ounce × 2.66666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per fluid ounce equals 958.611418535 base units, and 1 dram per teaspoon equals 359.479281951 base units, so dividing one by the other gives the direct ounce per fluid ounce-to-dram per teaspoon factor of 2.66666666667.
Simple example
1 oz/fl oz × 2.666666667 = 2.666666667 dr/tsp
1 ounce per fluid ounce = 2.666666667 drams per teaspoon.
Real-world example
1,000 oz/fl oz × 2.666666667 = 2,666.666667 dr/tsp
1,000 ounces per fluid ounce = 2,666.666667 drams per teaspoon.
Conversion table
| Ounce per Fluid ounce (oz/fl oz) | Dram per Teaspoon (dr/tsp) |
|---|---|
| 0.1 oz/fl oz | 0.2666666667 dr/tsp |
| 1 oz/fl oz | 2.666666667 dr/tsp |
| 10 oz/fl oz | 26.66666667 dr/tsp |
| 100 oz/fl oz | 266.6666667 dr/tsp |
| 1,000 oz/fl oz | 2,666.666667 dr/tsp |
| 10,000 oz/fl oz | 26,666.66667 dr/tsp |
Reverse conversion: Dram per Teaspoon to Ounce per Fluid ounce
2.666666667 dr/tsp × 0.375 = 1 oz/fl oz
2.666666667 drams per teaspoon = 1 ounces per fluid ounce.
ounces per fluid ounce = drams per teaspoon × 0.375
For a page dedicated to this direction, see Dram per Teaspoon to Ounce per Fluid ounce.
Understanding the Ounce per Fluid ounce (oz/fl oz)
Mass per volume density.
Understanding the Dram per Teaspoon (dr/tsp)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per teaspoon are in 1 ounce per fluid ounce?
1 ounce per fluid ounce equals 2.666666667 drams per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per fluid ounce to dram per teaspoon?
Multiply the ounce per fluid ounce value by 2.666666667. The converter above does this instantly to whatever precision you set.
How do I convert dram per teaspoon back to ounce per fluid ounce?
Use the reverse factor: 1 dram per teaspoon equals 0.375 ounces per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per fluid ounce?
Ounce per Fluid ounce (oz/fl oz) is a unit of density.
What is a dram per teaspoon?
Dram per Teaspoon (dr/tsp) is a unit of density.
Is the ounce per fluid ounce to dram per teaspoon conversion exact?
Yes. Both ounce per fluid ounce and dram per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 2.666666667 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.