Molar Mass Unit Converter
Convert an entered molar mass among g/mol, kg/mol, kg/kmol and lb/lbmol.
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Result
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Calculation steps
Work through one step at a time or reveal the complete calculation. The steps use your current inputs.
How to calculate
Convert mass and amount denominators while preserving the already specified chemical entity.
1 g/mol=0.001 kg/mol=1 kg/kmol=1 lb/lbmol
Worked example
18.015 g/mol is 0.018015 kg/mol, 18.015 kg/kmol and 18.015 lb/lbmol.
Assumptions and input details
This converts an entered molar mass and does not derive a chemical formula or isotope composition. One pound-mole is 453.59237 mol and one mass pound is 0.45359237 kg. A molar mass is different from the total mass of a sample and from a dimensionless relative molecular mass.
References: BIPM: SI derived quantities and units
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
Is my input uploaded?
The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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