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AC Tonnage Calculator — Room Allowance & Cooling kW / BTU
Convert a known cooling load to TR/BTU, or make a preliminary room estimate using an explicitly entered project heat-load allowance.
ELECTRICAL TOPICAC Tonnage Calculator
Your result
COOLING CAPACITYREADY
—Enter values below and press Calculate.
RESULT DISPLAYCooling kW ↔ TR
Calculation details & exports
Inputs used
ElectricalTopic.com Tools© 2026 ElectricalTopic.comCooling kW ↔ TRFormula and worked example
Room cooling kW = (area_m² × entered W/m² / 1000 + extra cooling kW) × (1 + allowance% / 100). TR = cooling kW / 3.516853; BTU/h = TR × 12000. Optional electrical-input estimate = cooling kW / COP.
Worked example
With 25 m², an illustrative entered allowance of 180 W/m², 0.5 extra cooling kW and 10% planning allowance: cooling load = 5.5 kW = 1.5639 TR. Separately, a known 5.2752795 cooling kW converts to 1.5 TR / 18,000 BTU/h. The example allowance is not an India-wide sizing rule.
Using this tool
Enter the actual equipment and project values. The Use example button loads an illustrative case. Calculation happens in your browser; no Python, API key or account is required. Use the result details to see the inputs and scope, copy the result, download CSV or print.
AC की electrical input power और cooling capacity अलग हैं। कमरे का केवल area देखकर final AC rating तय न करें; यहाँ W/m² आपका स्पष्ट planning input है।
Common questions
Can electrical-input kW be converted straight into TR?
No. TR is cooling output. Electrical input needs a valid COP/EER relationship before it can be related to cooling capacity.
Is the room allowance a standard value?
No. Enter a justified project allowance covering actual conditions. The tool deliberately does not present one room-area factor as a universal climate or building standard.
Does the result recommend an AC model?
It reports a cooling-capacity estimate/conversion. A complete sensible/latent heat-load survey, ventilation design and manufacturer selection remain separate.
Related practical guides
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Formula references and model scope
Formula review: 2 November 2026. Examples are illustrative. Enter project-specific data; a planning result does not certify an installation or equipment selection.
