Modulus Detailing Tools

Car Detailing Calculators

Free car detailing calculators for dilution ratios, PIR, snow foam mixes, cost per use and IPA panel wipe strength. Built to help you mix products properly and stop guessing.

Dilution Calculator PIR Calculator Foam Cannon Mix Cost Per Use IPA Calculator

Why These Tools Exist

Better results start with better measurements.

Concentrated detailing products are only good value when they are mixed correctly. Too weak and they underperform. Too strong and you waste product, increase cost per wash and may use more chemical strength than the job actually needs.

These calculators are designed for pre-washes, snow foams, wheel cleaners, interior cleaners, panel wipes and other detailing chemicals where dilution ratio, panel impact ratio and real cost per use matter.

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Tool 01

Dilution Calculator

Use this dilution calculator to work out how much chemical and water you need for common car detailing dilution ratios such as 1:4, 1:10, 1:20 or 1:100.

Enter your bottle size and dilution ratio.

What does a 1:10 dilution mean?

A 1:10 dilution usually means one part chemical to ten parts water. That gives eleven total parts. For a 1 litre bottle, that works out at roughly 91ml of chemical and 909ml of water.

Tool 02

PIR Calculator

Calculate estimated panel impact ratio for snow foam, pre-wash and foam cannon use. PIR helps estimate the final chemical strength that actually reaches the vehicle.

Enter your foam cannon values.

What is panel impact ratio?

Panel impact ratio, often shortened to PIR, is the estimated strength of the product once it has been diluted through a foam cannon or sprayer and lands on the vehicle. It matters because the mix in the bottle is not always the same as the final strength on the panel.

Tool 03

Foam Cannon Mix Calculator

Work out how much snow foam, pre-wash or shampoo to add to your foam cannon bottle before topping up with water.

Enter your foam cannon bottle size.

Is foam cannon dilution the same as PIR?

No. The foam cannon bottle mix is only the first dilution. Once the pressure washer pulls from the bottle, it dilutes the mix again with more water. That is why PIR is useful for estimating the strength that reaches the paintwork.

Tool 04

Cost Per Use Calculator

Calculate the real cost per wash, cost per application and approximate number of uses from a bottle of detailing product.

Enter product price, size and usage.

Why cost per use matters

Bottle price does not tell the whole story. A concentrated product can look more expensive upfront but work out cheaper per wash when used at the correct dilution.

Tool 05

IPA / Panel Wipe Calculator

Calculate how much IPA and water you need to make a target percentage panel wipe solution for paint preparation.

Enter your IPA strength and target percentage.

What strength IPA should you use?

IPA strength depends on the job, surface and product system being used. Stronger is not automatically better. The goal is to remove polishing oils or residues without causing unnecessary risk to sensitive surfaces.

Calculator FAQ

Common detailing calculator questions

What is the difference between dilution ratio and PIR?

Dilution ratio usually describes how a product is mixed in a bottle or sprayer. PIR estimates the final product strength that reaches the vehicle after equipment dilution, especially through a foam cannon.

Can these calculators be used for snow foam?

Yes. The dilution calculator and foam cannon mix calculator can help with bottle mixes, while the PIR calculator is useful for estimating the final strength on the panel.

Can these calculators be used for pre-wash products?

Yes. Pre-wash products are often diluted depending on the level of grime, weather, surface condition and product strength. Always follow product guidance and test carefully.

Why does cost per use matter?

Cost per use shows the real value of a product. A cheaper bottle may not be cheaper if it needs to be used stronger or runs out faster.