Molarity to PPM Converter
Common Conversions
| M | ppm |
|---|---|
| 0.00001 | 0.584 |
| 0.0001 | 5.844 |
| 0.001 | 58.44 |
| 0.005 | 292.2 |
| 0.01 | 584.4 |
| 0.05 | 2922 |
| 0.1 | 5844 |
| 0.5 | 29220 |
| 1 | 58440 |
| 2 | 116880 |
| 5 | 292200 |
Why this conversion matters in chemistry
Molarity counts molecules per liter; ppm counts mass per million units of mass. To get from one to the other, you go through molar mass: M × MW gives g/L, and × 1000 brings it to mg/L, which equals ppm for dilute aqueous solutions. A 1.79 µM iron stock for a calibration curve becomes 0.100 mg/L (100 ppb), which lets a calibration anchored in molarity sit honestly next to the EPA secondary MCL of 0.3 mg/L (0.3 ppm) for iron in drinking water. The compound identity sets the conversion — without the molar mass, there's no way to bridge between mole-counting and mass-counting.
Formula
Worked Examples
1 mM NaCl in water — useful as the textbook anchor for stepping from molarity to ppm.
10 mM calcium chloride — a working concentration for hard-water simulations and gel-formation studies.
0.1 mM iron — well above the EPA secondary MCL for drinking water (0.3 ppm), useful for spiked recovery experiments.
0.1 M glucose — the same value lands as 1.8% w/v on a clinical or food-chemistry label.