Mass per volume density.
Ounces per Teaspoon to Drams per Milliliter Converter — oz/tsp to dr/mL
Convert Ounce per Teaspoon (oz/tsp) to Dram per Milliliter (dr/mL) using the exact conversion factor (1 ounce per teaspoon = 3.246146179 dram per milliliter). See the formula, worked examples, and conversion table.
Ounces per Teaspoon to Drams per Milliliter 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 5751.668511 / 1771.845195.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Teaspoon to Drams per Milliliter
Ounce per Teaspoon and Dram per Milliliter 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 milliliter = ounces per teaspoon × 3.24614617938
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per teaspoon equals 5751.66851121 base units, and 1 dram per milliliter equals 1771.84519531 base units, so dividing one by the other gives the direct ounce per teaspoon-to-dram per milliliter factor of 3.24614617938.
Simple example
1 oz/tsp × 3.246146179 = 3.246146179 dr/mL
1 ounce per teaspoon = 3.246146179 drams per milliliter.
Real-world example
1,000 oz/tsp × 3.246146179 = 3,246.146179 dr/mL
1,000 ounces per teaspoon = 3,246.146179 drams per milliliter.
Conversion table
| Ounce per Teaspoon (oz/tsp) | Dram per Milliliter (dr/mL) |
|---|---|
| 0.1 oz/tsp | 0.3246146179 dr/mL |
| 1 oz/tsp | 3.246146179 dr/mL |
| 10 oz/tsp | 32.46146179 dr/mL |
| 100 oz/tsp | 324.6146179 dr/mL |
| 1,000 oz/tsp | 3,246.146179 dr/mL |
| 10,000 oz/tsp | 32,461.46179 dr/mL |
Reverse conversion: Dram per Milliliter to Ounce per Teaspoon
3.246146179 dr/mL × 0.3080575996 = 0.9999999999 oz/tsp
3.246146179 drams per milliliter = 0.9999999999 ounces per teaspoon.
ounces per teaspoon = drams per milliliter × 0.308057599609
For a page dedicated to this direction, see Dram per Milliliter to Ounce per Teaspoon.
Understanding the Ounce per Teaspoon (oz/tsp)
Mass per volume density.
Understanding the Dram per Milliliter (dr/mL)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per milliliter are in 1 ounce per teaspoon?
1 ounce per teaspoon equals 3.246146179 drams per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per teaspoon to dram per milliliter?
Multiply the ounce per teaspoon value by 3.246146179. The converter above does this instantly to whatever precision you set.
How do I convert dram per milliliter back to ounce per teaspoon?
Use the reverse factor: 1 dram per milliliter equals 0.3080575996 ounces per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per teaspoon?
Ounce per Teaspoon (oz/tsp) is a unit of density.
What is a dram per milliliter?
Dram per Milliliter (dr/mL) is a unit of density.
Is the ounce per teaspoon to dram per milliliter conversion exact?
Yes. Both ounce per teaspoon and dram per milliliter are defined by fixed standards rather than physical artifacts, so the factor of 3.246146179 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.