Mass per volume density.
Troy ounces per Fluid ounce to Drams per Fluid ounce Converter — oz t/fl oz to dr/fl oz
Convert Troy ounce per Fluid ounce (oz t/fl oz) to Dram per Fluid ounce (dr/fl oz) using the exact conversion factor (1 troy ounce per fluid ounce = 17.55428571 dram per fluid ounce). See the formula, worked examples, and conversion table.
Troy ounces per Fluid ounce to Drams 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 1051.733671 / 59.91321366.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Troy ounces per Fluid ounce to Drams per Fluid ounce
Troy ounce per Fluid ounce and Dram 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
drams per fluid ounce = troy ounces per fluid ounce × 17.5542857143
This factor comes from each unit's defined relationship to the category's base unit: 1 troy ounce per fluid ounce equals 1051.73367062 base units, and 1 dram per fluid ounce equals 59.9132136584 base units, so dividing one by the other gives the direct troy ounce per fluid ounce-to-dram per fluid ounce factor of 17.5542857143.
Simple example
1 oz t/fl oz × 17.55428571 = 17.55428571 dr/fl oz
1 troy ounce per fluid ounce = 17.55428571 drams per fluid ounce.
Real-world example
1,000 oz t/fl oz × 17.55428571 = 17,554.28571 dr/fl oz
1,000 troy ounces per fluid ounce = 17,554.28571 drams per fluid ounce.
Conversion table
| Troy ounce per Fluid ounce (oz t/fl oz) | Dram per Fluid ounce (dr/fl oz) |
|---|---|
| 0.1 oz t/fl oz | 1.755428571 dr/fl oz |
| 1 oz t/fl oz | 17.55428571 dr/fl oz |
| 10 oz t/fl oz | 175.5428571 dr/fl oz |
| 100 oz t/fl oz | 1,755.428571 dr/fl oz |
| 1,000 oz t/fl oz | 17,554.28571 dr/fl oz |
| 10,000 oz t/fl oz | 175,542.8571 dr/fl oz |
Reverse conversion: Dram per Fluid ounce to Troy ounce per Fluid ounce
17.55428571 dr/fl oz × 0.05696614583 = 0.9999999998 oz t/fl oz
17.55428571 drams per fluid ounce = 0.9999999998 troy ounces per fluid ounce.
troy ounces per fluid ounce = drams per fluid ounce × 0.0569661458333
For a page dedicated to this direction, see Dram per Fluid ounce to Troy ounce per Fluid ounce.
Understanding the Troy ounce per Fluid ounce (oz t/fl oz)
Mass per volume density.
Understanding the Dram per Fluid ounce (dr/fl oz)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per fluid ounce are in 1 troy ounce per fluid ounce?
1 troy ounce per fluid ounce equals 17.55428571 drams per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert troy ounce per fluid ounce to dram per fluid ounce?
Multiply the troy ounce per fluid ounce value by 17.55428571. The converter above does this instantly to whatever precision you set.
How do I convert dram per fluid ounce back to troy ounce per fluid ounce?
Use the reverse factor: 1 dram per fluid ounce equals 0.0569661458 troy ounces per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a troy ounce per fluid ounce?
Troy ounce per Fluid ounce (oz t/fl oz) is a unit of density.
What is a dram per fluid ounce?
Dram per Fluid ounce (dr/fl oz) is a unit of density.
Is the troy ounce per fluid ounce to dram per fluid ounce conversion exact?
Yes. Both troy ounce per fluid ounce and dram per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 17.55428571 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.