Mass concentration.
Milligrams per Fluid ounce to Micrograms per Milliliter Converter — mg/fl oz to ug/mL
Convert Milligram per Fluid ounce (mg/fl oz) to Microgram per Milliliter (ug/mL) using the exact conversion factor (1 milligram per fluid ounce = 33.8140227 microgram per milliliter). See the formula, worked examples, and conversion table.
Milligrams per Fluid ounce to Micrograms 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 0.0338140227 / 0.001.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Fluid ounce to Micrograms per Milliliter
Milligram per Fluid ounce and Microgram 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
micrograms per milliliter = milligrams per fluid ounce × 33.8140227018
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per fluid ounce equals 0.0338140227018 base units, and 1 microgram per milliliter equals 0.001 base units, so dividing one by the other gives the direct milligram per fluid ounce-to-microgram per milliliter factor of 33.8140227018.
Simple example
1 mg/fl oz × 33.8140227 = 33.8140227 ug/mL
1 milligram per fluid ounce = 33.8140227 micrograms per milliliter.
Real-world example
100 mg/fl oz × 33.8140227 = 3,381.40227 ug/mL
100 milligrams per fluid ounce = 3,381.40227 micrograms per milliliter.
Conversion table
| Milligram per Fluid ounce (mg/fl oz) | Microgram per Milliliter (ug/mL) |
|---|---|
| 0.001 mg/fl oz | 0.0338140227 ug/mL |
| 0.01 mg/fl oz | 0.338140227 ug/mL |
| 0.1 mg/fl oz | 3.38140227 ug/mL |
| 1 mg/fl oz | 33.8140227 ug/mL |
| 10 mg/fl oz | 338.140227 ug/mL |
| 100 mg/fl oz | 3,381.40227 ug/mL |
Reverse conversion: Microgram per Milliliter to Milligram per Fluid ounce
33.8140227 ug/mL × 0.02957352956 = 0.9999999999 mg/fl oz
33.8140227 micrograms per milliliter = 0.9999999999 milligrams per fluid ounce.
milligrams per fluid ounce = micrograms per milliliter × 0.0295735295625
For a page dedicated to this direction, see Microgram per Milliliter to Milligram per Fluid ounce.
Understanding the Milligram per Fluid ounce (mg/fl oz)
Mass concentration.
Understanding the Microgram per Milliliter (ug/mL)
Mass concentration.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per milliliter are in 1 milligram per fluid ounce?
1 milligram per fluid ounce equals 33.8140227 micrograms per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per fluid ounce to microgram per milliliter?
Multiply the milligram per fluid ounce value by 33.8140227. The converter above does this instantly to whatever precision you set.
How do I convert microgram per milliliter back to milligram per fluid ounce?
Use the reverse factor: 1 microgram per milliliter equals 0.0295735296 milligrams per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per fluid ounce?
Milligram per Fluid ounce (mg/fl oz) is a unit of chemistry.
What is a microgram per milliliter?
Microgram per Milliliter (ug/mL) is a unit of chemistry.
Is the milligram per fluid ounce to microgram per milliliter conversion exact?
Yes. Both milligram per fluid ounce and microgram 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.