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Free cooling tower calculators
Quick, reliable answers in your browser — no sign-up. The same methods and example cases as the PlantCalcKit Excel tools.
Free online
Water balance
Evaporation, blowdown, makeup and yearly water cost — and what higher cycles would save.
Open calculator →Free online
Performance test
Tower capability from three curve readings, with the fan-power correction.
Open calculator →Free online
Water chemistry
LSI, RSI, PSI, Larson-Skold and the screening maximum cycles for your makeup water.
Open calculator →Free online
Thermal rating
Predicted cold water at any wet-bulb, flow, heat load or fan power (Merkel method).
Open calculator →These calculators give engineering estimates for learning and screening. For design, acceptance tests and treatment changes, use your site data, your equipment maker and your plant's approved procedures.