Concentration calculator
Molarity (M), mass concentration (g/L), or mass percent (% w/w) in one tool.
Calculator
How to use
Concentration modes
- Molarity (mol/L): $M = n/V$
- Mass per volume (g/L): $c = m_{\text{solute}}/V$
- % w/w: $% = 100 \times m_{\text{solute}}/m_{\text{solution}}$
Pick the mode that matches your lab label or problem statement.
When to use
- Comparing bottle labels (%, M, or g/L).
- Homework that mixes concentration units.
Educational use only. Double-check values for labs, homework, and exams.