Blast: Pressure Washer Calc
The right PSI for every surface, the right nozzle for your washer, and honest never-wash verdicts — every number cited.
What it does
Blast is the pressure-washer reference. The surface guide, nozzle color code, and Wash Safe are free forever: Consumer Reports' pressure bands (decks 800–1,000 PSI, siding 1,200–1,500, concrete 1,500–3,000) plus the surfaces CR says never to pressure-wash — roofs, and yes, cars — and CPSC's safety rules (an injection wound is a surgical emergency; GFCI for electric units; never run gas units in a garage; never spray from a ladder).
Blast is honest by design: blogs publish "safe car PSI" numbers; Consumer Reports says the jet nicks paint and invites rust, so Blast ships CR's verdict with attribution — not the folklore.
Blast Pro — one-time unlock
$6.99, once. Nozzle size: your washer's rated PSI and GPM become the exact nozzle number to buy — the CAT Pumps standard selection formula — plus your cleaning units. Soap & dilution: the detergent label's ratio becomes ounces per gallon and a total for your mix tank. No subscription, no ads, no account.
Privacy
Blast collects nothing. No analytics, no accounts, no cloud. Privacy policy · Support