A free, no-login set of fireground hydraulics calculators built on the same math that powers the PumpForge training simulator, aligned with NFPA 1002 and IFSTA. Use them on a phone at the panel, in the classroom, or for size-up and planning.
Running a training page of your own? Put any of these calculators on your website — two lines of HTML, free for departments and academies.
Nozzle pressure + friction loss + elevation + appliance loss, instantly.
Hose friction loss from size, flow, and length.
Available fire flow at 20 psi residual, pitot-to-gpm, and hydrant color class.
Push-back for smooth bore and fog nozzles, for safe handline crewing.
Flow a solid-stream tip delivers from diameter and pressure.
NFA and Iowa State fireground flow estimates for size-up.
How long your tank or supply lasts at a given flow rate.
Concentrate needed from flow, duration, and proportioning %.
Pump operators and instructors shouldn’t have to hunt for a reliable calculator. These run the exact hydraulics engine inside PumpForge — deterministic, NFPA 1002 / IFSTA-aligned, and the same numbers your operators see in the simulator. No login, no cost, no catch. If they help your department, use and share them freely.
Is there a fire hose friction loss calculator app? There is nothing to download. The fire hose friction loss calculator and the other calculators on this page open in the web browser on any phone, tablet, or computer, free and with no login. Bookmark the page to keep it one tap away.
PumpForge puts your operators on a realistic pump panel running these exact hydraulics — 16 built-in scenarios, automatic scoring, after-action reports, certificates. Every station, any computer or tablet.
See the fire pump simulator →All tools use standard IFSTA / NFA / NFPA 1002 formulas for training and estimation. Always verify against your department SOPs and manufacturer ratings. Learn how the underlying engine works on the hydraulics engine page.