pH Adjustment (Cosmetics) Calculator

Acid or base addition for target pH in formulations.

Batch size (g)

Current pH

Target pH

Buffer capacity (mol/L/pH)

Adjuster concentration (mol/L)

Batch density (g/mL)

Tab to move between fields

Adjuster volume (mL)

46.88

Adjuster weight (g)

46.88

pH change needed-1.5

Acidifying? (1=yes)1

Adjuster (% of batch)9.38

Moles needed0.02

Exceeds 2% limit? (1=yes)1

pH safety category3

How to Use This Calculator

Enter the current measured pH and target pH of your formula.
Set the batch size and initial concentration of your adjusting agent.
Input the estimated buffering capacity of the formula.
Review the approximate volume of pH adjuster (citric acid, NaOH, etc.) to add.
Always verify final pH with a calibrated pH meter after adjustment -- this provides an estimate only.

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