§ Sheet CL / 06 · Free calculator
MANUAL J LOAD CALCULATOR LITE
FOR HVAC CONTRACTORS.
Room-by-room cooling/heating load in minutes — no spreadsheet.
§ Run it
Manual J Load Calc · Lite
A fast cooling-load sanity check. For a real Manual J — room-by-room, load-corrected, latent-aware — use Estimate.Pro Pro inside the app.
Total cooling load55,400BTU/h
Suggested system size4.6tons
Per-sqft load31BTU/h/ft²
§ Built for HVAC contractors
WHY IT MATTERS.
Manual J Load Calculator (Lite) is one of the must-have tools for anyone bidding hvac service work. Inside Estimate.Pro it’s wired into the line-item engine so your output becomes a sendable bid in the same session — not a number copied off a calculator into a spreadsheet.
HVAC Service overview§ Equip the crew
Your math, in your bid.
Free forever tier · 14-day Pro trial · no credit card.