Solution Concentration Converter
Convert between common measures of solution concentration: percent by mass, ppm, ppb, mg/L, g/L, and molarity (mol/L).
Common Solution Concentration Conversions
| From | To |
|---|---|
| 1 % | 10,000 ppm |
| 1 ppm | 1,000 ppb |
| 1 mol/L NaCl | ~58.44 g/L |
| 100 mg/L | 0.01 % |
Solution Concentration Unit Definitions
- Percent (%)
- g solute per 100 g solution.
- ppm
- mg solute per kg solution (or mg/L for water).
- ppb
- µg solute per kg solution.
- mg/L
- Milligrams per liter; for dilute aqueous solutions ≈ ppm.
- Molar (mol/L)
- Moles of solute per liter.
Frequently Asked Questions
What is the difference between ppm and ppb?
ppm = parts per million; ppb = parts per billion. 1 ppm = 1,000 ppb.
How is % concentration defined?
% typically means mass/volume % or mass/mass %. 1% w/v = 1 g per 100 mL.
How do I convert mg/L to ppm?
For dilute aqueous solutions, 1 mg/L ≈ 1 ppm (since 1 L of water ≈ 1 kg). This approximation is valid for concentrations below ~1,000 mg/L.