VouchedPros Tools

AC Sizing Calculator

Estimate the cooling capacity your home needs. Enter your details for a BTU and tonnage range.

This is a planning estimate, not a substitute for a load calculation. A proper size comes from a Manual J load calculation by a licensed contractor, which accounts for insulation, windows, ductwork, and orientation. Oversizing wastes money and short-cycles the system; undersizing can't keep up in peak heat. Use this to sanity-check a contractor's recommendation.

Get a Manual J sizing from a vetted pro

Top-rated local HVAC installers ranked by our Vouched Score.

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