How It Works
This calculator works in 4 steps.
Enter the premix ratio
Type the concentrate-to-water premix.
Enter the equipment ratio
Type the injector or proportioner ratio, measured or rated.
Confirm the conventions
Select parts-of-water or parts-of-total for each ratio.
Read the overall dilution
The calculator returns the overall DF, ratio, and percent of concentrate at the point of use.
The Formula
The formula multiplies the 2 stage dilution factors.
DF = X + 1DF_total = DF_premix × DF_equipment1 : (DF_total − 1)- X:
- Water parts in a stage ratio
- DF_premix / DF_equipment:
- Stage dilution factors
A 1:4 premix (DF 5) through a 1:10 proportioner (DF 11) gives DF 55, an overall ratio of 1:54, or 1.82% concentrate.
Conversion Table
The conversion table combines 6 premix and equipment ratios into the overall dilution.
| Premix | Equipment | Stage factors | Overall DF | Overall ratio |
|---|---|---|---|---|
| 1:4 | 1:10 | 5 × 11 | 55 | 1:54 |
| 1:10 | 1:20 | 11 × 21 | 231 | 1:230 |
| 1:1 | 1:64 | 2 × 65 | 130 | 1:129 |
| 1:3 | 1:16 | 4 × 17 | 68 | 1:67 |
| 1:5 | 1:8 | 6 × 9 | 54 | 1:53 |
| 1:2 | 1:100 | 3 × 101 | 303 | 1:302 |
What Is the Two-Stage Cleaning Dilution Calculator?
The Two-Stage Cleaning Dilution Calculator is a tool that combines a premix dilution with a second dilution made by equipment, such as an injector, proportioner, or foam cannon, and returns the overall dilution at the point of use. The overall factor equals the premix factor times the equipment factor.
Many cleaning systems dilute twice. A concentrate is premixed 1:4 in a jug, and the jug feeds a 1:10 proportioner. The overall result is not 1:14 or 1:40: in the parts-of-water convention, the factors are 5 and 11, so the overall factor is 55 and the overall ratio is 1:54. The calculator states each convention and shows the arithmetic.
Common Uses
There are 5 main uses of this calculator.
Label compliance
Users check that the final mix matches the product label.
Dispenser setup
Technicians set premix strength to suit a fixed proportioner.
Pressure washing
Operators combine bottle mixes with downstream injection.
Fleet cleaning
Crews standardize multi-stage dilutions across sites.
Cost tracking
Managers compute concentrate use per gallon at the point of use.