Heat pump tool
Heat Pump Sizing Calculator
Estimate heat-pump tons and BTU/h from home square footage and a broad climate factor before getting a professional load calculation.
Screening estimate only.A professional Manual J load calculation is authoritative for final heat-pump sizing and equipment selection.
Screening result
Fine Print and Sources
Screening estimate only. These tools use only the values you enter and simple planning math. A professional Manual J load calculation is authoritative for equipment sizing, room loads, and final purchase decisions.
The square-footage divided by 600 rule and climate multipliers are screening estimates. EnergySage says one ton equals 12,000 BTU/h, notes that many home systems are in the 2 to 5 ton range, and warns that per-square-foot shortcuts are unreliable.
- EnergySage heat pump sizing guide: cites 1 ton as 12,000 BTU/h, explains why per-square-foot shortcuts are unreliable, and describes Manual J as the reliable sizing method.