Stock Solution PPM Calculator
Making a 10,000 PPM stock to dilute from later? Weighing the exact grams now saves every future dilution. Enter target and volume — get grams.
Calculator
Stock Solution PPM Calculator
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Making a 10,000 PPM stock to dilute from later? Weighing the exact grams now saves every future dilution. Enter target and volume — get grams.
How to use this calculator
- Enter target stock PPM.
- Enter final volume.
- Weigh the grams shown.
- Dissolve and bring to volume in a volumetric flask.
The formula
Grams = PPM × liters ÷ 1,000.
What the inputs mean
The target is the concentration you want, in PPM. The volume is how much liquid you are treating. The result tells you exactly how much solute to add.
Worked example
1 L of 10,000 PPM NaCl stock → 10 g.
Quick reference
| Target | Grams per liter |
|---|---|
| 1,000 PPM | 1 g |
| 10,000 PPM | 10 g |
Per liter of solution.
Where you will actually use this
Accurate stocks make every downstream dilution accurate.
- Analytical standards
- Teaching labs
- QC solutions
Mistakes that give wrong answers
- Not using a volumetric flask
- Weighing hygroscopic salts without drying
Key takeaways
- Formula: Solute (g) = Target PPM × Volume (L) ÷ 1,000
- Remember: Per liter of solution.
- Watch out for: Not using a volumetric flask
- Next step: run your own numbers in the calculator above, then verify with a measurement — calculated values are only as good as the inputs.
Frequently asked questions
Why make a stock instead of direct?
One accurate weighing beats many small error-prone ones.