ExcelFor fire protection engineers, designers & inspectors

Fire protection calcs you can actually audit.

Instant-download Excel tools for sprinkler hydraulics, fire pumps and tanks, fire alarm batteries and voltage drop, plus NFPA 25-style ITM checklists. Formulas are visible, inputs are color-coded, and reference data is editable.

  • Instant download after checkout
  • Unlocked, auditable formulas
  • From $19, one-time payment
Fire-Pump-and-Tank-Sizing-Workbook.xlsx
Screenshot of the Fire Pump and Water Storage Tank Sizing Workbook with example inputs
  • Excel workbooks (.xlsx) and printable PDF
  • Secure checkout by Stripe
  • Files delivered right after payment
  • Single-user license, unlimited projects
The toolkit

Fire protection calculation spreadsheets and checklists

Five focused tools, each with worked example rows and a Read Me sheet. Buy one, or get every tool in the bundle.

Best value · save $56

Complete Bundle: all 5 tools

Every workbook and the ITM checklist pack in one download. $155 if bought separately.

  • Fire Pump & Water Storage Tank Sizing Workbook
  • NFPA 25-Style ITM Checklist Pack
  • Sprinkler Pipe Friction Loss Calculator (Hazen-Williams)
  • Fire Alarm Battery (Secondary Power) Calculator
  • NAC Voltage Drop Calculator
$99$155 if bought separately
Fire pumps & tanksExcel

Fire Pump & Water Storage Tank Sizing Workbook

Check a candidate fire pump against your demand and water supply, size suction and discharge piping losses, and size a storage tank.

  • Supply curve from your flow test (N^1.85 method)
  • Pump curve through churn, 100% and 150% points
  • Checks: churn ≤ 140% of rated, ≥ 65% of rated at 150% flow, suction pressure floor, max pressure at churn, suction velocity
Inspection & testingExcel + PDF

NFPA 25-Style ITM Checklist Pack

Weekly through 5-year inspection, testing and maintenance checklists for sprinklers, standpipes, private mains, fire pumps, tanks and valves.

  • Weekly, Monthly, Quarterly (incl. semiannual), Annual and 5-Year+ tabs
  • Pass / Fail / N/A dropdowns, date and initials columns
  • Deficiency and impairment log with open/closed status
Fire alarmExcel

Fire Alarm Battery (Secondary Power) Calculator

Total standby and alarm current, apply standby/alarm time and margin, and get a suggested battery size.

  • Up to 40 device/module rows
  • Adjustable standby hours, alarm minutes and safety margin
  • Suggested next standard battery size (editable list)
Fire alarmExcel

NAC Voltage Drop Calculator

Check notification appliance circuits for voltage drop with the conservative end-loaded method.

  • 30 circuits per sheet, pass/fail per circuit
  • Max circuit length for your load
  • Solid and stranded copper resistance table (editable)

One-time payment in US dollars. By purchasing you agree to the Terms and Refund policy.

How it works

From checkout to download in three steps

No account or subscription needed. Pay once, keep the files.

  1. Pick a tool

    Choose a single workbook, or the Complete Bundle with all five tools.

  2. Pay securely with Stripe

    Checkout runs on Stripe. We never see or store your full card number.

  3. Download instantly

    You land on your download page right after payment. Bookmark it to download again later.

What you get

Built to be checked, not trusted blindly

Engineering tools should show their work. Ours do.

Unlocked formulas you can audit

Sheets are protected without a password, only to prevent accidental edits.

Color-coded inputs, editable reference data

Inputs are color-coded, and reference tables such as pipe IDs and battery sizes can be edited.

Worked example rows

See exactly how each tool behaves before you enter your own project data.

Read Me sheet

The method, assumptions and limits are written down in every workbook.

Single-user license, unlimited projects

Use the files in your own work, including work for clients. Firm-wide licenses on request.

Fair refund policy

A file problem is fixed or refunded in full within 14 days. Formula errors are corrected and sent to you.

Free tools

Free calculators & guides

Quick browser calculators with the method explained. Nothing you type leaves your browser.

Hazen-Williams friction loss calculator (sprinkler pipe)Free online Hazen-Williams friction loss calculator for fire sprinkler pipe: psi per foot, total loss, elevation and velocity.Open calculatorHow to do a fire alarm battery calculation (with free calculator)Step-by-step fire alarm battery calculation with a free calculator: standby and alarm amp-hours, safety margin and battery size.Open calculatorHow to calculate NAC voltage drop (with free calculator)How to calculate fire alarm NAC voltage drop with the end-loaded method, plus a free calculator with pass/fail and max circuit length.Open calculatorHow to check a fire pump curve against demand and water supply (with free calculator)Check a fire pump against your sprinkler demand and water flow test: supply curve, pump curve at demand, margin, churn and 150% flow checks, with a free calculator.Open calculatorHow to do a sprinkler density/area flow calculation (with free calculator)How to estimate sprinkler system demand with the density/area method: design flow, number of flowing sprinklers, remote head pressure from the K-factor, and hose allowance, with a free calculator.Open calculatorHow to read a hydrant flow test (with free calculator)Turn a static/residual hydrant flow test into available flow at any residual pressure with the N^1.85 formula, plus a free browser calculator.Open calculatorFire alarm secondary power calculator (standby + alarm)Estimate fire alarm secondary (battery) capacity from standby and alarm currents and required durations, with a free browser calculator. Educational only.Open calculatorAll free calculators & guidesBrowse the full library of methods and worked examples.View all
FAQ

Questions, answered

Anything else? Email christian@hayeslabs.io.

What do I get when I buy?

An instant download. Workbooks are Excel files (.xlsx); the ITM Checklist Pack also includes a printable PDF; the Complete Bundle is one .zip with 5 Excel workbooks and 1 PDF.

How does delivery work?

Checkout is handled by Stripe. Right after payment you're taken to your download page. Bookmark it to download again later. Your receipt is emailed to you.

Can I see and check the formulas?

Yes. Formulas are unlocked so you can audit them. Sheets are protected without a password, only to prevent accidental edits, and each workbook has a Read Me sheet with the method, assumptions and limits.

Can I use the tools on client projects?

Yes. The license is single user, unlimited projects, including work for clients. You may not resell, share or publish the files. Firm-wide licenses are available on request. See the Terms.

Do these replace the code or a professional review?

No. Educational helper tools. Results depend entirely on your inputs. They do not replace the code edition adopted by your authority having jurisdiction, manufacturer data, or review by a qualified design professional.

What if a file doesn't work?

If a file won't open, is corrupted, or doesn't match its description, email us within 14 days of purchase and we'll fix it or refund you in full. If you find a formula error, we'll correct it, send you the update, and refund you if you ask. See the refund policy.

Are you affiliated with NFPA?

No. ChurnPoint Tools is not affiliated with or endorsed by NFPA. Our tools contain no NFPA text; they reference section or chapter numbers only.

Every tool, one download, $99

Pump and tank sizing, friction loss, battery and voltage drop calculators, plus the ITM checklist pack. $155 if bought separately.