Convert CFM to m3/s

About This Tool

Purpose & User Intent: This tool provides a precise, instant conversion from cubic feet per minute (CFM) to cubic meters per second (m3/s). It serves HVAC engineers, building designers, facility managers, energy analysts, and code-compliance reviewers who need quick SI-unit results for ventilation sizing, duct design, and energy modeling. The problem addressed is translating US customary flow values into metric units to enable cross-team communication, regulatory reporting, and integration with SI-based spreadsheets. Core Logic & Features: The calculator accepts a single numeric input in CFM and computes the corresponding m3/s using the exact conversion factor m3/s = CFM × 0.0004719474432. Required features include non-negative input validation, instantaneous calculation, and a clearly formatted numeric output. Optional/advanced features can include configurable decimal precision, display of both exact and rounded values, and explicit unit labeling. The tool assumes standard volumetric flow conversion without pressure or temperature corrections, which would require separately specified air properties. Inputs & Outputs: Input: name 'cfm', type 'number', units 'cubic feet per minute (ft3/min)', sample value 100, validation 'non-negative'. Output: name 'm3_per_s', type 'number', units 'cubic meters per second (m3/s)', formatting 'default 6 decimals'. Edge cases are handled by returning zero for zero input and by rejecting negative inputs with an error state (no UI messaging). The tool aims for numeric stability across typical HVAC ranges (0.001 to 100000 cfm) and uses a fixed conversion constant to avoid rounding drift in repeated calculations. Algorithms & Calculations: Core method is a direct linear conversion. m3_per_s = cfm × 0.0004719474432. Rounding rules can be applied post-calculation; typical practice is six decimals, with options to round to fewer decimals for reports. The tool does not account for air density or pressure variations, which affect mass flow, only volumetric flow rate. Error & Edge Cases: Non-numeric, missing, or negative inputs are invalid. Extremely large values may require display formatting to scientific notation. If input is absent, the tool returns an error state and prompts for a numeric value. The domain assumes standard, non-extreme conditions for flow rate representation. Industry/Region & Localization: Uses SI units (m3/s) as outputs and English (US) conventions for sample values. Supports rounding and formatting in a way suitable for technical reports and cross-border collaboration. Assumptions & Exclusions: Assumes pure volumetric flow rate conversion; does not adapt for temperature, pressure, gas composition, or humid air effects; not a mass flow converter.

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