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HVAC
AC Running Cost Calculator
Estimate your AC electricity cost per hour, day and month from AC size, running hours and your price per unit, with a downloadable PDF result.
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HVAC Calculators & Articles
Free online HVAC calculators and engineering guides for MEP professionals. Standard-based formulas, worked examples and practical site tips.
All HVAC Calculators
Standard-based tools with PDF results. Free to use, no signup.
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HVAC
AC Tonnage Calculator
Estimate the AC tonnage you need from room size, sun exposure, windows, people and equipment, with a downloadable PDF result.
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HVAC
BTU Calculator
Calculate BTU/h for AC cooling or room heating from room size, and convert BTU/h, kW, TR and kcal/h, with a downloadable PDF result.
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HVAC
TR to CFM and CFM to TR Calculator
Convert TR to CFM or CFM to TR using the rule of thumb or the air temperature difference. Get airflow in m³/h and L/s, cooling capacity in kW and BTU/hr, and the electrical input power for chillers, split ACs and window ACs.
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Guides, tutorials and design basics from site to office.
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🚧 Coming Soon
HVAC articles are on the way
We are writing practical guides and tutorials for this category. Fresh articles will be published here very soon.