Chemical Dilution Calculator

Convert any dilution ratio to ounces per gallon or milliliters per liter instantly. Dial in the right mix for cleaning, degreasing, car wash, and more — with imperial and metric units.

Dilution Calculator

1:32 is usually used for wheel cleaner and heavy presoak.

:
gal
Your Mix
3.88 oz
Concentrate
124 oz
Water
3.88 oz/gal
Rate
3.03%
Concentration
Safety reminder: Always add concentrate to water, not the other way around. For disinfectants, follow the EPA-registered label dilution exactly.

Quick Reference: Common Dilution Ratios

Most cleaning and car-wash chemistry falls into a handful of standard ratios. Use this table to spot-check your mix or pick a starting point for a new application.

Ratio

Oz per Gallon

ml per Liter

Concentration

Typical Use

1:4

25.6 oz

200 ml

20.0%

Heavy degreasing

1:8

14.2 oz

111 ml

11.1%

Heavy duty cleaner

1:16

7.5 oz

59 ml

5.9%

General purpose

1:32

3.9 oz

30 ml

3.0%

Multi-surface cleaner

1:64

2.0 oz

15 ml

1.5%

Light maintenance

1:128

1.0 oz

7.8 ml

0.78%

Glass & surface spray

1:256

0.5 oz

3.9 ml

0.39%

Floor finish, presoak

1:400

0.32 oz

2.5 ml

0.25%

Car wash presoak

How to Read a Dilution Ratio

A dilution ratio expresses the relationship between chemical concentrate and water, written as two numbers separated by a colon. The format is concentrate : water. A 1:32 ratio means one part concentrate mixed with thirty-two parts water, for a total of 33 parts of finished solution.

To convert a ratio into ounces per gallon, divide 128 (the number of ounces in a gallon) by the total parts. For a 1:32 ratio, that is 128 divided by 33, which equals approximately 3.9 ounces of concentrate per gallon of finished solution. For metric, divide 1,000 ml (one liter) by the total parts.

Always add concentrate to water, never the other way around. This matters for both mixing consistency and safety — adding water to concentrated acids or alkalis can cause violent exothermic reactions.

Frequently Asked Questions

A 1:32 dilution means 1 part chemical concentrate mixed with 32 parts water, for a total of 33 parts of finished solution. In a one-gallon container, that works out to about 3.9 ounces of concentrate and roughly 124.1 ounces of water — about a 3% concentration.

A 1:128 dilution ratio equals approximately 1 ounce of concentrate per gallon of finished solution. The precise calculation is 128 ÷ 129 = 0.99 oz, but 1 oz per gallon is the standard working figure. It's one of the most common ratios in professional cleaning because the math is so easy.

Always add concentrate to water. Fill your container with water first, then measure and pour the concentrate in slowly. This prevents violent exothermic reactions with strong acids or alkalis and produces a more consistent mix.

No. Disinfectant dilution ratios are regulated by the EPA and registered on the product label. Using a different ratio makes the product legally ineffective as a disinfectant and may not achieve the required kill claim. Always follow the label exactly.

2 ounces per gallon is equivalent to approximately a 1:63 ratio (2 oz concentrate + 126 oz water). In practice it is commonly rounded to the familiar 1:64 ratio used for light maintenance cleaning.

Want the full guide?

For a deeper look at dilution control systems, titration testing, common mistakes, and how water quality affects your mix, read our Chemical Dilution Ratio Guide.

Read the full guide →

Need help dialing in your chemical program?

At Sky Blue Chemical we formulate concentrates designed to hit optimal performance at your preferred dilution ratio. Whether you are running a car wash, managing an industrial facility, or launching your own product line, we can help.

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