Dilution Ratios Explained — Module 2
⭐ Free Taster Micro-Course. This module gives you a practical introduction to dilution ratios for cleaners. For full professional training with CPD certification, explore our paid courses.
What you'll learn in this module
- How to calculate how much chemical to add to 100ml or 1 litre of water
- How to use a quick reference table on the job
- How to scale up for larger volumes
How to Calculate Dilution Ratios
The easiest way to work out dilution ratios is to fix the amount of water and calculate how much chemical to add. The two most useful reference points are 100ml (a small spray bottle top-up) and 1 litre (a standard trigger spray bottle or mop bucket measure).
| Ratio | Chemical | Water |
|---|---|---|
| 1:10 | 10ml | 100ml |
| 1:20 | 5ml | 100ml |
| 1:50 | 2ml | 100ml |
| 1:100 | 1ml | 100ml |
| Ratio | Chemical | Water |
|---|---|---|
| 1:10 | 100ml | 1000ml |
| 1:20 | 50ml | 1000ml |
| 1:50 | 20ml | 1000ml |
| 1:100 | 10ml | 1000ml |
Quick rule: To find how much chemical to add per litre, divide 1000 by the second number in the ratio. For 1:20, that is 1000 ÷ 20 = 50ml of chemical per litre of water.
Scaling Up
For larger volumes, simply multiply. If you need 5 litres of a 1:20 solution, you need 5 × 50ml = 250ml of chemical topped up to 5 litres with water. Always add chemical to water — never the other way around — to avoid splashing concentrated product.
Safety note: Always add chemical to water, not water to chemical. This reduces the risk of splashing and chemical reaction.
📋 Want to track your progress?
Create a free CCMTec account to track your learning and access your completion certificate.
Create a free CCMTec account to track your learning and access your completion certificate.
Disclaimer: This micro-course provides a general introduction to dilution ratios for cleaning chemicals. It is not a substitute for full professional training. Always follow manufacturer guidance and refer to current HSE guidance for your specific workplace.
Dilution Ratios Explained — Free Micro-Course | Version 1.0 — Reviewed May 2026 | CCMTec Cleaning & Janitorial Supplies