Mass per volume density.
Micrograms per Teaspoon to Grains per Milliliter Converter — ug/tsp to gr/mL
Convert Microgram per Teaspoon (ug/tsp) to Grain per Milliliter (gr/mL) using the exact conversion factor (1 microgram per teaspoon = 0.000003131 grain per milliliter). See the formula, worked examples, and conversion table.
Micrograms per Teaspoon to Grains 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 0.0002028841362 / 64.79891.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Teaspoon to Grains per Milliliter
Microgram per Teaspoon and Grain 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
grains per milliliter = micrograms per teaspoon × 0.00000313098069414
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per teaspoon equals 0.000202884136211 base units, and 1 grain per milliliter equals 64.79891 base units, so dividing one by the other gives the direct microgram per teaspoon-to-grain per milliliter factor of 0.00000313098069414.
Simple example
1 ug/tsp × 0.000003130980694 = 0.000003131 gr/mL
1 microgram per teaspoon = 0.000003131 grains per milliliter.
Real-world example
1,000 ug/tsp × 0.000003130980694 = 0.0031309807 gr/mL
1,000 micrograms per teaspoon = 0.0031309807 grains per milliliter.
Conversion table
| Microgram per Teaspoon (ug/tsp) | Grain per Milliliter (gr/mL) |
|---|---|
| 0.1 ug/tsp | 3.130981e-7 gr/mL |
| 1 ug/tsp | 0.000003131 gr/mL |
| 10 ug/tsp | 0.0000313098 gr/mL |
| 100 ug/tsp | 0.0003130981 gr/mL |
| 1,000 ug/tsp | 0.0031309807 gr/mL |
| 10,000 ug/tsp | 0.0313098069 gr/mL |
Reverse conversion: Grain per Milliliter to Microgram per Teaspoon
0.000003131 gr/mL × 319388.7468 = 1.000006166 ug/tsp
0.000003131 grains per milliliter = 1.000006166 micrograms per teaspoon.
micrograms per teaspoon = grains per milliliter × 319388.74675
For a page dedicated to this direction, see Grain per Milliliter to Microgram per Teaspoon.
Understanding the Microgram per Teaspoon (ug/tsp)
Mass per volume density.
Understanding the Grain per Milliliter (gr/mL)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per milliliter are in 1 microgram per teaspoon?
1 microgram per teaspoon equals 0.000003131 grains per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per teaspoon to grain per milliliter?
Multiply the microgram per teaspoon value by 0.000003130980694. The converter above does this instantly to whatever precision you set.
How do I convert grain per milliliter back to microgram per teaspoon?
Use the reverse factor: 1 grain per milliliter equals 319,388.7468 micrograms per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per teaspoon?
Microgram per Teaspoon (ug/tsp) is a unit of density.
What is a grain per milliliter?
Grain per Milliliter (gr/mL) is a unit of density.
Is the microgram per teaspoon to grain per milliliter conversion exact?
Yes. Both microgram per teaspoon and grain per milliliter are defined by fixed standards rather than physical artifacts, so the factor of 0.000003130980694 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.