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Sanitiser Concentration Calculator

Work out sanitiser concentration instantly with clear inputs, formula shown and shareable results.

About Sanitiser Concentration Calculator

Active ingredient needed is target concentration in ppm times solution volume divided by 1000, giving grams. Dividing by the product's active strength gives the volume of concentrate. Efficacy depends on the product of concentration and contact time, so a weaker solution held longer can be equivalent.

Formulas

Sanitiser dose

Active needed (g) = target ppm x volume (L) / 1000; product = active / strength fraction

CT value

CT = concentration (ppm) x contact time (minutes)

Worked example

With the default values below, Sanitiser Concentration Calculator returns Product Required of 166.667. Change any input above and every figure here is recalculated in your browser.

Inputs used

Target Concentrationminimum 0 ppm
200 ppm
Solution Volumeminimum 0 L
100 L
Product Active Strengthaccepts 0–100 %
12 %
Required Contact Timeminimum 0 seconds
60 seconds

Results

Product Required
166.667
Active Ingredient Needed
20.0000
Dilution Ratio (1 in n)
600.0
Concentration-Time Value
200.00

Step by step

  1. 1Values used
  2. 2Sanitiser dose
  3. 3CT value
  4. 4Product Required= 166.667
  5. 5Active Ingredient Needed= 20.0000
  6. 6Dilution Ratio (1 in n)= 600.0
  7. 7Concentration-Time Value= 200.00

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Sanitiser concentrations, permitted uses and rinse requirements are regulated for food contact surfaces. Verify concentration at point of use and follow the label and safety data sheet.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Sanitiser concentrations, permitted uses and rinse requirements are regulated for food contact surfaces. Verify concentration at point of use and follow the label and safety data sheet.

Frequently Asked Questions

What concentrations are typical?

Chlorine 100-200 ppm for food contact surfaces, quaternary ammonium 200-400 ppm, peracetic acid 80-200 ppm. Higher is not better — excess leaves residues and can be corrosive.

Why must concentration be verified?

Sanitiser depletes on contact with organic soil and degrades with time, light and temperature. Test strips or titration at point of use are required; the make-up calculation alone is not evidence.

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