Mass concentration.
Milligrams per Fluid ounce to Milligrams per Liter Converter — mg/fl oz to mg/L
Convert Milligram per Fluid ounce (mg/fl oz) to Milligram per Liter (mg/L) using the exact conversion factor (1 milligram per fluid ounce = 33.8140227 milligram per liter). See the formula, worked examples, conversion table, and common uses.
Milligrams per Fluid ounce to Milligrams per Liter 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 Milligrams per Liter
Milligram per Fluid ounce and Milligram per Liter 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 liter = 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 milligram per liter equals 0.001 base units, so dividing one by the other gives the direct milligram per fluid ounce-to-milligram per liter factor of 33.8140227018.
Simple example
1 mg/fl oz × 33.8140227 = 33.8140227 mg/L
1 milligram per fluid ounce = 33.8140227 milligrams per liter.
Real-world example
100 mg/fl oz × 33.8140227 = 3,381.40227 mg/L
100 milligrams per fluid ounce = 3,381.40227 milligrams per liter.
Conversion table
| Milligram per Fluid ounce (mg/fl oz) | Milligram per Liter (mg/L) |
|---|---|
| 0.001 mg/fl oz | 0.0338140227 mg/L |
| 0.01 mg/fl oz | 0.338140227 mg/L |
| 0.1 mg/fl oz | 3.38140227 mg/L |
| 1 mg/fl oz | 33.8140227 mg/L |
| 10 mg/fl oz | 338.140227 mg/L |
| 100 mg/fl oz | 3,381.40227 mg/L |
Reverse conversion: Milligram per Liter to Milligram per Fluid ounce
33.8140227 mg/L × 0.02957352956 = 0.9999999999 mg/fl oz
33.8140227 milligrams per liter = 0.9999999999 milligrams per fluid ounce.
milligrams per fluid ounce = milligrams per liter × 0.0295735295625
For a page dedicated to this direction, see Milligram per Liter to Milligram per Fluid ounce.
Understanding the Milligram per Fluid ounce (mg/fl oz)
Mass concentration.
Understanding the Milligram per Liter
Milligram per Liter (mg/L) measures mass concentration. One milligram of a substance per liter of solution — for dilute water-based solutions, numerically almost identical to parts per million (ppm). It is classified as a metric derived concentration unit.
Where it's used: The standard unit for drinking-water and environmental contaminant limits worldwide (EPA, WHO)
mg/L vs. g/L. Both are metric mass-concentration units; 1,000 mg/L equals 1 g/L. mg/L is used for dilute concentrations (drinking water, blood tests), while g/L is more common for higher concentrations.
Uses of the Milligram per Liter today
- Drinking-water quality standards and contaminant limits
- Blood and serum concentration reporting in clinical medicine
- Environmental and wastewater testing
Milligram per Liter — sources
- US EPA — National Primary Drinking Water Regulations — Contaminant limits are set and reported in mg/L.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per liter are in 1 milligram per fluid ounce?
1 milligram per fluid ounce equals 33.8140227 milligrams per liter, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per fluid ounce to milligram per liter?
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 milligram per liter back to milligram per fluid ounce?
Use the reverse factor: 1 milligram per liter 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 milligram per liter?
Milligram per Liter (mg/L) measures mass concentration. One milligram of a substance per liter of solution — for dilute water-based solutions, numerically almost identical to parts per million (ppm). It is classified as a metric derived concentration unit.
Is the milligram per fluid ounce to milligram per liter conversion exact?
Yes. Both milligram per fluid ounce and milligram per liter 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 is the difference between mg/l vs. g/l?
Both are metric mass-concentration units; 1,000 mg/L equals 1 g/L. mg/L is used for dilute concentrations (drinking water, blood tests), while g/L is more common for higher concentrations.