Engineering calculators that think like a plant engineer.
Free online calculators, ready-to-use Excel tools and a plain-language field guide — starting with cooling towers and cooling water.
Answer the everyday cooling tower questions in a minute
Water balance
Evaporation, blowdown, makeup and yearly water cost — and what higher cycles would save.
Open calculator →Performance test
Tower capability from three curve readings, with the fan-power correction.
Open calculator →Water chemistry
LSI, RSI, PSI, Larson-Skold and the screening maximum cycles for your makeup water.
Open calculator →Thermal rating
Predicted cold water at any wet-bulb, flow, heat load or fan power (Merkel method).
Open calculator →Four Excel tools and a 121-page field guide
Everything a utilities engineer needs to run, test and treat a cooling tower — in one download.
- Water Balance — evaporation, blowdown, makeup and water cost, three cases side by side
- Performance Test — capability, cell-by-cell results and screening diagnostics
- Water Chemistry and Cycles — indices, safe cycles, acid feed and programme cost
- Thermal Rating and Upgrade — predicted cold water and upgrade payback
- Cooling Towers Made Simple — the e-book for operators and young engineers
USD 129 USD 200
Built by a working plant engineer, for working plant engineers
Reliable before fancy
Every tool is checked against published worked examples and a standard example case before release. If a feature is not robust, it does not ship.
Nothing hidden
Formulas are visible, the method and its references are written out, and assumptions are stated. You can check every step — and defend the result in a review.
Made for real plants
Any units, three climates, field checks against site data, print-ready reports, and plain-language warnings when an input looks wrong.
Start with the first three chapters, free
How a cooling tower works, range and approach, wet-bulb, L/G, tower types and parts — plus a fully worked example: is your tower performing well?
