Formula
mol/L=mg/L /(1000 ×molar mass).
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Input is explicitly mg/L. Treating ppm by mass as mg/L additionally requires density near 1 kg/L.
Example Calculation
Example inputs
- Mass concentration: 100 mg/L
- Solute molar mass: 50 g/mol
Mass concentration = 100; Solute molar mass = 50. Primary result: 0.002.
Frequently asked questions
How do I use this calculator?
Enter mass concentration, solute molar mass. The result updates automatically. Use Reset to restore the example values.
What method does it use?
mol/L=mg/L /(1000 ×molar mass).. Input is explicitly mg/L. Treating ppm by mass as mg/L additionally requires density near 1 kg/L.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.