CDK research and buying advice · Reviewed 29 October 2026 · No first-hand product testing.
Snow Foam PIR: Calculate from Your Own Calibration and Instructions
Panel impact ratio, commonly shortened to PIR, describes the product proportion delivered at the panel rather than merely the mixture in a foam-lance bottle. Confusing those stages can produce the wrong calculation. The helper below checks arithmetic from your own figures; it chooses no chemical, target strength or operating method and does not verify the accuracy of a physical calibration.
Check your PIR arithmetic
Use your product’s own PIR instructions and the total plain-water output collected using its supported calibration method. Keep the equipment and settings the same. This helper selects no product or recommended strength.
Enter all three figures to calculate.
Arithmetic assumes the calibrated draw remains the same. Figures are rounded; measurement accuracy and suitability are not verified. A bottle-mixture instruction is a different calculation. No entries are saved or sent.
Identify which instruction you actually have
Find the current instructions for the exact product and delivery equipment. A bottle-mixture ratio and a delivered PIR describe different stages. Do not enter a bottle percentage into the PIR field simply because it is the only percentage available. If the instructions do not specify a relevant PIR method, this helper is not the right route for that recipe.
The Bilt Hamber Auto-Foam technical sheet is a named example of a manufacturer describing delivered concentration and a collection-based calculation. It is not proof that the checked Polar Blast selection uses the same target or calibration procedure. Keep each product’s instructions attached to that product rather than transferring a convenient figure across the range.
Use a supported same-setting measurement
The calculation assumes you have followed the relevant manufacturer’s plain-water calibration method and know the total collected output associated with emptying a known reservoir fill. The total is not just the amount originally placed in the bottle: the delivery system also draws from the pressure washer’s water supply. Enter litres for the total output and millilitres for the reservoir fill.
Keep the relevant equipment and settings consistent with that measurement. A changed lance adjustment, delivery arrangement or operating condition can change the draw, so a previous measurement is not a universal property of the washer. Follow the equipment’s operating instructions; this arithmetic page is not a replacement for them or an instruction to discharge a washer into any improvised container.
Understand what the helper calculates
Product volume equals total collected output in millilitres multiplied by the target percentage divided by one hundred. The remaining reservoir fill is water. For an arithmetic example only, ten litres of measured total output and an entered one per cent target require one hundred millilitres of product; a one-thousand-millilitre reservoir would then have nine hundred millilitres of water.
Those example figures are not a recommended strength for any product. Notice that the bottle would contain ten per cent product while the entered delivered target is one per cent. That difference is why a reservoir percentage cannot be silently substituted for PIR. The result depends on the user’s target, correct units and a relevant calibration.
Treat rejected or tiny results as information
The helper leaves its inputs blank. It rejects missing or invalid figures, a total output no greater than the reservoir fill, and a combination requiring more product than the stated reservoir holds. Do not work around a rejected result by changing the target until the display looks convenient. Recheck units, measurement and the actual instructions.
Outputs are rounded for reading. Very small quantities may be below the practical resolution of your measuring equipment; the calculator does not validate that equipment or manufacture a suitable dilution. Likewise, a mathematically possible result does not establish chemical compatibility, safe handling or a suitable cleaning method. Resolve those questions through the named instructions.
Connect measurement to a sensible purchase
If the system cannot achieve a manufacturer-directed result within its supported setup, ask the relevant supplier about the equipment and product combination. A stronger concentrate or a different lance is not automatically the answer. Keep the distinction between an arithmetic result and a recommendation to apply something to a vehicle.
Our checked snow-foam and lance guides cover the existing named selections and fit questions. The helper stores and transmits none of your entries. CDK would compare usable quantities and a workable method before bottle price, while keeping unsupported performance scores and current cost claims out of the calculation.