Central AC Sizing Guide

The right system size helps keep your whole home comfortable without making your HVAC work harder than it needs to. Enter your home’s square footage and conditions below for a quick size recommendation.

Want us to match the size and system for you? Use Find My System→.

Central AC Size Calculator

Tell Us About Your Home

Home Square Footage

Enter the approximate conditioned square footage of your home.

Home Conditions

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Your Recommended Size

Tell us about your room and we’ll recommend a size that fits.

System Size Guide Chart

System SizeTypical Coverage Range
1.5 Tonup to 900 sq ft
2 Ton900–1,200 sq ft
2.5 Ton1,200–1,500 sq ft
3 Ton1,500–1,800 sq ft
4 Ton1,800–2,400 sq ft
5 Ton2,400–3,000 sq ft

Between Two Sizes?

The right choice can depend on climate, ceiling height, insulation, and sun exposure-not just square footage.

Need a more precise recommendation?

Answer a few quick questions about your room and how you plan to install it. We’ll recommend the best fit.

Find My System →

Common Sizing Mistakes

Undersizing

A system that's too small may run longer and still leave parts of your home struggling to stay comfortable in extreme weather.

Oversizing

A system that's too large may cyde on and off too quickly, leading to less consistent comfort and lower efficiency.

Central AC Sizing FAQ

Most homes require about 1 ton of cooling capacity for every 600–900 square feet, depending on insulation, ceiling height, windows, and climate.

A typical 2,000 sq ft home often requires a 3–4 ton system, depending on insulation quality and climate.

Slightly larger systems are usually safer than undersized ones. Undersized systems may struggle during extreme temperatures.

HVAC tonnage measures cooling capacity. One ton equals 12,000 BTUs of cooling per hour.