Mass per volume density.
Grams per Fluid ounce to Milligrams per Milliliter Converter — g/fl oz to mg/mL
Convert Gram per Fluid ounce (g/fl oz) to Milligram per Milliliter (mg/mL) using the exact conversion factor (1 gram per fluid ounce = 33.8140227 milligram per milliliter). See the formula, worked examples, and conversion table.
Grams per Fluid ounce to Milligrams 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 33.8140227 / 1.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Fluid ounce to Milligrams per Milliliter
Gram per Fluid ounce and Milligram 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
milligrams per milliliter = grams per fluid ounce × 33.8140227018
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per fluid ounce equals 33.8140227018 base units, and 1 milligram per milliliter equals 1 base unit, so dividing one by the other gives the direct gram per fluid ounce-to-milligram per milliliter factor of 33.8140227018.
Simple example
1 g/fl oz × 33.8140227 = 33.8140227 mg/mL
1 gram per fluid ounce = 33.8140227 milligrams per milliliter.
Real-world example
1,000 g/fl oz × 33.8140227 = 33,814.0227 mg/mL
1,000 grams per fluid ounce = 33,814.0227 milligrams per milliliter.
Conversion table
| Gram per Fluid ounce (g/fl oz) | Milligram per Milliliter (mg/mL) |
|---|---|
| 0.1 g/fl oz | 3.38140227 mg/mL |
| 1 g/fl oz | 33.8140227 mg/mL |
| 10 g/fl oz | 338.140227 mg/mL |
| 100 g/fl oz | 3,381.40227 mg/mL |
| 1,000 g/fl oz | 33,814.0227 mg/mL |
| 10,000 g/fl oz | 338,140.227 mg/mL |
Reverse conversion: Milligram per Milliliter to Gram per Fluid ounce
33.8140227 mg/mL × 0.02957352956 = 0.9999999999 g/fl oz
33.8140227 milligrams per milliliter = 0.9999999999 grams per fluid ounce.
grams per fluid ounce = milligrams per milliliter × 0.0295735295625
For a page dedicated to this direction, see Milligram per Milliliter to Gram per Fluid ounce.
Understanding the Gram per Fluid ounce (g/fl oz)
Mass per volume density.
Understanding the Milligram per Milliliter (mg/mL)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per milliliter are in 1 gram per fluid ounce?
1 gram per fluid ounce equals 33.8140227 milligrams per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert gram per fluid ounce to milligram per milliliter?
Multiply the gram per fluid ounce value by 33.8140227. The converter above does this instantly to whatever precision you set.
How do I convert milligram per milliliter back to gram per fluid ounce?
Use the reverse factor: 1 milligram per milliliter equals 0.0295735296 grams per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per fluid ounce?
Gram per Fluid ounce (g/fl oz) is a unit of density.
What is a milligram per milliliter?
Milligram per Milliliter (mg/mL) is a unit of density.
Is the gram per fluid ounce to milligram per milliliter conversion exact?
Yes. Both gram per fluid ounce and milligram per milliliter are defined by fixed standards rather than physical artifacts, so the factor of 33.8140227 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.