Mass concentration.
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
Chemistry Converter
Convert concentration, molarity, amount, and laboratory scientific units by compatible family.
Context values
Some unit families need one extra value for a physically accurate result.
Mass concentration.
Result = input x 33.8140227 / 1.
Mass Concentration units are compatible.
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 mass concentration — how much of a substance is dissolved or dispersed in a given volume — a core calculation for preparing lab solutions, checking water quality against a regulatory limit, or formulating a pharmaceutical dose. Both are mass concentration 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
100 g/fl oz × 33.8140227 = 3,381.40227 mg/mL
100 grams per fluid ounce = 3,381.40227 milligrams per milliliter.
Conversion table
| Gram per Fluid ounce (g/fl oz) | Milligram per Milliliter (mg/mL) |
|---|---|
| 0.001 g/fl oz | 0.0338140227 mg/mL |
| 0.01 g/fl oz | 0.338140227 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 |
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 concentration.
Understanding the Milligram per Milliliter (mg/mL)
Mass concentration.
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 chemistry.
What is a milligram per milliliter?
Milligram per Milliliter (mg/mL) is a unit of chemistry.
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 mass concentration and molarity?
Mass concentration expresses how much mass of a substance is present per unit volume (for example, grams per liter). Molarity expresses the amount in moles per liter instead, which accounts for the substance's molecular weight. This category converts mass-concentration units.