Authoritative definitions of the International System of Units and SI prefixes.
Unit converters
Chemistry concentration converter
Convert chemistry concentration units including g/L, mg/L, µg/L, kg/m³, mol/L, mmol/L. See the formula, conversion tables and examples for your selected units.
Chemistry concentration unitsInstant result
Decimals
Formula result = input × 1 ÷ 0.001. 1 g/L = 1,000 mg/L
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Milligrams per litre1,000 mg/L
Micrograms per litre1,000,000 µg/L
Kilograms per cubic metre1 kg/m³
Conversion table
| g/L | mg/L |
|---|---|
| 1 g/L | 1,000 mg/L |
| 2 g/L | 2,000 mg/L |
| 5 g/L | 5,000 mg/L |
| 10 g/L | 10,000 mg/L |
| 25 g/L | 25,000 mg/L |
| 50 g/L | 50,000 mg/L |
| 100 g/L | 100,000 mg/L |
Conversion chart
1 g/L1,000 mg/L
5 g/L5,000 mg/L
10 g/L10,000 mg/L
25 g/L25,000 mg/L
50 g/L50,000 mg/L
Worked example
1 g/L = 1,000 mg/L. Apply the selected conversion formula to other input values.
Unit definition
Grams per litre (g/L) One grams per litre equals 1 gram per litre.
Unit history
Grams per litre is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert g/L to gram per litre.
3. Convert the base value to mg/L and apply your display precision.
Understand the result before using it
Chemistry concentration converts mass concentration, amount concentration, or dilute-solution proportions within the selected group. The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1 ÷ 0.001
Assumptions
- The source and target selections represent the same physical quantity or supported notation.
- The entered value is valid for the selected relationship and uses the source unit shown.
- Published unit definitions and conventional conversion factors apply under their stated conditions.
Worked example
1 g/L equals 1 kg/m³.
When to use it
Good uses
- Translate a chemistry concentration value found in a document, specification, recipe, or measurement.
- Compare values reported in different unit systems.
- Check a manual conversion and control the displayed precision.
Limitations
Common mistakes to avoid
- A ppm value is not automatically a mass-per-volume value; the equivalence depends on density and how concentration is defined.
- Do not add meaningful digits beyond the precision of the original measurement.
- Confirm regulated, safety-critical, laboratory, and contractual values against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
What does the Chemistry concentration converter do?
Chemistry concentration converts mass concentration, amount concentration, or dilute-solution proportions within the selected group. It does not change the physical quantity represented by the input.
What formula does the Chemistry concentration converter use?
result = input × 1 ÷ 0.001
Why can a Chemistry concentration converter result be rounded?
UnitMora calculates with JavaScript double-precision numbers, then formats the result using your selected decimal or significant-figure setting. The unrounded value may contain more digits than are displayed.
What is the most common chemistry concentration conversion mistake?
A ppm value is not automatically a mass-per-volume value; the equivalence depends on density and how concentration is defined.
Chemistry concentration conversion tables
Open a unit pair for its formula, worked example and reference table.
- Grams per litre to Milligrams per litre
- Milligrams per litre to Grams per litre
- Grams per litre to Micrograms per litre
- Micrograms per litre to Grams per litre
- Grams per litre to Kilograms per cubic metre
- Kilograms per cubic metre to Grams per litre
- Moles per litre to Millimoles per litre
- Millimoles per litre to Moles per litre
- Moles per litre to Micromoles per litre
- Micromoles per litre to Moles per litre
- Moles per litre to Moles per cubic metre
- Moles per cubic metre to Moles per litre
- Fraction to Percent
- Percent to Fraction
- Fraction to Per mille
- Per mille to Fraction
- Fraction to Parts per million
- Parts per million to Fraction
- Fraction to Parts per billion
- Parts per billion to Fraction
Clear answers, without the guesswork
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