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HVAC Tonnage Calculator
Size central AC/heat pump in tons (1 ton = 12,000 BTU/hr). Uses Manual J shortcut: ~600 sq ft per ton with insulation/climate adjustment.
LIFESTYLESize central AC/heat pump in tons (1 ton = 12,000 BTU/hr). Uses Manual J shortcut: ~600 sq ft per ton with insulation/climate adjustment.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
HVAC Tonnage Calculator
1 ton AC = 12,000 BTU/hr. Manual J shortcut: ~600 sq ft per ton with average insulation in mixed climate. Adjust for climate and insulation.
Recommended Tonnage
4.5 tons
Calculated BTU/hr50,000 BTU/hr
Calculated tons4.17
For precision, request an HVAC pro do a Manual J load calculation accounting for windows, orientation, air leakage, and occupant heat gain. Oversizing is the #1 cause of short-cycling and high humidity.
Frequently Asked Questions
What is the HVAC Tonnage Calculator for?
Size central AC/heat pump in tons (1 ton = 12,000 BTU/hr). Uses Manual J shortcut: ~600 sq ft per ton with insulation/climate adjustment.
How do I use the HVAC Tonnage Calculator?
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
How accurate are my hvac tonnage results?
Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Is the HVAC Tonnage Calculator free to use?
Yes - every calculator on WhichCalc is completely free with no signup, no usage limits, and no tracking on the calculation itself. Results display instantly in your browser and your inputs are never sent to a server. Bookmark the page if you use this calculator regularly.