Foam Concentrate

Required foam volume by class and application rate.

Run the calculator

Formula and source

Foam concentrate volume = application_rate (gpm/ft²) × area × duration × concentration_pct. Class A typical 0.1-0.5%, Class B AFFF/AR-AFFF 1-6%.

NFPA 11 (Standard for Low-, Medium-, and High-Expansion Foam) by name; manufacturer foam-concentrate technical data (National Foam, Chemguard, Solberg) by name.

Audience

This tile is built for fire-ground and the adjacent professions in the Fire-Ground Engineering group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.