PlantCalcKit
For plant, process and utilities engineers

Process engineering calculators that think like a plant engineer.

48 free online calculators for pumps, heat exchangers, pipe pressure drop, orifices, fluid properties and cooling towers. When you need the full job — every input checked, findings and a print-ready report — use the paid browser tools or the Excel workbooks.

Use the free calculatorsBrowse Excel tools

Built by a practising process engineer · how every tool is checked

Results table from the Pump Head, Power and Efficiency report: impeller 560 mm, operating flow 6,000 m³/h, head on the curve 29.09 m, efficiency 85.8 %, shaft power 551.9 kW, head margin over the required head +11.9 %Example data
Results sheet from the Pump Head, Power and Efficiency Excel tool, built-in example case (cooling-water pump, 560 mm impeller).Full sample report (PDF)See the tool

Start with your equipment

Each category has free calculators and, where it adds something, a paid browser tool and an Excel workbook.

Free calculator, browser tool or Excel workbook?

The same engineering, three ways to use it. Pick by how much you need back.

Free calculators

Quick answer

USD 0
  • 48 calculators, no sign-up
  • Runs in your browser; your inputs stay on your device
  • Basic input warnings, SI and US units
  • Method explained on the page; print the page
Open the calculators
Online tools

Full result, in your browser

From USD 9
  • 40 tools; enter and check your data free
  • 3 runs for USD 9 (use within 30 days), monthly USD 15, yearly USD 99
  • One run unlocks one tool for 2 hours
  • Every input checked, findings and a printable results sheet
  • Inputs are sent to our server only to calculate and are not stored
See the online tools
Excel workbooks

Yours to keep

From USD 19
  • 40 tools, 4 bundles and 3 e-books
  • One payment, instant download, updates to the version you buy
  • Every formula visible; works offline in Excel 2010 or later
  • Print-ready report with your plant details and sign-off
Browse the Excel shop

Online runs and Excel workbooks are separate licences: buying one does not include the other.

Three Excel tools engineers ask about

Each one is a complete working file with its own Guide, example case and report sheet.

Excel tool

Utilities Cost Calculator

Works out what every utility your plant makes costs, all solved together from your monthly logged totals.

  • Steam at up to six pressures on IAPWS-IF97 steam tables
  • Power from every source, with a plant average cost per MWh
  • Water chain, cooling water, air and nitrogen in one file

USD 79

View details
Excel tool

Cooling Tower Performance Test

Tests tower capability from field data by the performance-curve method.

  • Up to 12 cells, with cell-by-cell results
  • Screening diagnostics for recirculation, fill fouling and fan problems
  • Test-validity checks against editable limits

USD 49

View details
See all 40 Excel tools and 4 bundles

What you get: a real report and workbook

Screens from the Pump Head, Power and Efficiency tool with its built-in example case loaded. Every Excel tool has a sample report you can download before you buy.

Calculator sheet with inputs, units and sources
Inputs: units, sources and the example loaded.
Results sheet with the principal results
Results: operating point, margins and motor loading.
Findings and charts page of the printable report
Printable report: findings, recommendations and charts.
Download the sample report (PDF)See this tool

How the tools are checked

  • Methods come from the standard references and are described on each tool's page.
  • Each Excel product page names what it was checked against: independent calculation models, published worked examples or both.
  • Warnings flag impossible inputs and values outside typical ranges. Results are engineering estimates: verify important decisions against site data and your equipment maker.
How we check our toolsAbout PlantCalcKit

PlantCalcKit is built by a practising process engineer who uses these calculations on plant work. The tools are for engineering estimates, screening and training; they are not certified or approved by any standards body.

Free

The Free Starter Pack

Two guide samplers, three Lite Excel tools and two quick-reference cards. Free: the checkout shows a zero price and needs only your email address to deliver the files.

Get the Starter Pack
Contents of the Free Starter Pack

Not sure where to start?

Open a free calculator for the job in front of you. If you need the full result or a file to keep, every calculator page shows the matching browser tool or Excel workbook.

Find a free calculatorRead the calculation guides

Join PlantCalcKit — free

Be first to hear about new calculators, Excel tools and field guides — one short email when something new is ready. The calculators stay free with or without an account.

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