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Fire Extinguisher Config Calculator

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GB 50140 Q=K·S/U, class A/B, hazard levels, factor K

Quick Answer

Fire Extinguisher Config Calculator: GB 50140 Q=K·S/U, class A/B, hazard levels, factor K. Fire Extinguisher Config Calculator uses standard everyday life formulas to compute accurate results instantly.

Calculation unit

㎡
Min. required fire rating4A（单具最小 2A）
Recommended setupMF/ABC4（2A） × 2 具

Calculation (GB 50140-2005)

  1. 1Q = K × S / U = 1 × 300 ÷ 75 = 4A
  2. 2Units = max(2, ⌈Q ÷ per-unit rating⌉) = 2
Per GB 50140-2005: Q = K·S/U with U = 100/75/50 ㎡/A (A-class light/ordinary/extra) or 1.5/1.0/0.5 ㎡/B; min per-unit ratings 1A/2A/3A and 21B/55B/89B. At least 2 units per compartment, max 5 per station; max travel distance 15/20/25 m (A-class) or 9/12/15 m (B-class) — add stations beyond. Basement/crowded areas go one hazard level up. ABC dry powder covers A/B/C/E; Class C follows B basis; Class F (cooking oil) needs wet chemical.

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How to Use

  1. Enter scenario values: fill real-life numbers into the Fire Extinguisher Config Calculator (defaults work for a quick try).
  2. Instant results: everything computes live, no button needed.
  3. Read the advice: results come with practical tips, reference standards and pitfalls.
  4. Compare options: adjust parameters to compare choices side by side.

Key Points

  • Fire Extinguisher Config Calculator is a free online everyday life tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: GB 50140 Q=K·S/U, class A/B, hazard levels, factor K.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Fire Extinguisher Config Calculator formula

Fire Extinguisher Config Calculator uses standard everyday life formulas to compute accurate results instantly.

FAQ

How do I use the Fire Extinguisher Config Calculator?
Open the page and fill in the input fields — results update automatically. GB 50140 Q=K·S/U, class A/B, hazard levels, factor K.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on common formulas and industry conventions. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Fire Extinguisher Config Calculator[EB/OL]. https://www.yijiansuan.com/en/c/life/fire-extinguisher

Results provided by this tool are for reference only and do not constitute professional advice.