Mass per volume density.
Grains per Teaspoon to Micrograms per Fluid ounce Converter — gr/tsp to ug/fl oz
Convert Grain per Teaspoon (gr/tsp) to Microgram per Fluid ounce (ug/fl oz) using the exact conversion factor (1 grain per teaspoon = 388,793.46 microgram per fluid ounce). See the formula, worked examples, and conversion table.
Grains per Teaspoon to Micrograms 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 13.14667088 / 3.38140227e-5.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Teaspoon to Micrograms per Fluid ounce
Grain per Teaspoon and Microgram 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
micrograms per fluid ounce = grains per teaspoon × 388793.46
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per teaspoon equals 13.1466708828 base units, and 1 microgram per fluid ounce equals 0.0000338140227018 base units, so dividing one by the other gives the direct grain per teaspoon-to-microgram per fluid ounce factor of 388793.46.
Simple example
1 gr/tsp × 388793.46 = 388,793.46 ug/fl oz
1 grain per teaspoon = 388,793.46 micrograms per fluid ounce.
Real-world example
1,000 gr/tsp × 388793.46 = 388,793,460 ug/fl oz
1,000 grains per teaspoon = 388,793,460 micrograms per fluid ounce.
Conversion table
| Grain per Teaspoon (gr/tsp) | Microgram per Fluid ounce (ug/fl oz) |
|---|---|
| 0.1 gr/tsp | 38,879.346 ug/fl oz |
| 1 gr/tsp | 388,793.46 ug/fl oz |
| 10 gr/tsp | 3,887,934.6 ug/fl oz |
| 100 gr/tsp | 38,879,346 ug/fl oz |
| 1,000 gr/tsp | 388,793,460 ug/fl oz |
| 10,000 gr/tsp | 3,887,934,600 ug/fl oz |
Reverse conversion: Microgram per Fluid ounce to Grain per Teaspoon
1 ug/fl oz × 0.000002572059725 = 0.0000025721 gr/tsp
1 microgram per fluid ounce = 0.0000025721 grains per teaspoon.
grains per teaspoon = micrograms per fluid ounce × 0.00000257205972549
For a page dedicated to this direction, see Microgram per Fluid ounce to Grain per Teaspoon.
Understanding the Grain per Teaspoon (gr/tsp)
Mass per volume density.
Understanding the Microgram per Fluid ounce (ug/fl oz)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per fluid ounce are in 1 grain per teaspoon?
1 grain per teaspoon equals 388,793.46 micrograms per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert grain per teaspoon to microgram per fluid ounce?
Multiply the grain per teaspoon value by 388793.46. The converter above does this instantly to whatever precision you set.
How do I convert microgram per fluid ounce back to grain per teaspoon?
Use the reverse factor: 1 microgram per fluid ounce equals 0.0000025721 grains per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per teaspoon?
Grain per Teaspoon (gr/tsp) is a unit of density.
What is a microgram per fluid ounce?
Microgram per Fluid ounce (ug/fl oz) is a unit of density.
Is the grain per teaspoon to microgram per fluid ounce conversion exact?
Yes. Both grain per teaspoon and microgram per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 388793.46 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.