HVAC Tonnage Calculator

Estimate the right AC or heat pump size for your home. Enter your square footage, ceiling height, and climate zone to see which system tonnage fits your needs, compare installed costs, and review annual operating costs across SEER efficiency ratings.

Climate Zone

Home Square Footage

Ceiling Height (ft)

Electricity Rate ($/kWh)

System Pricing (edit to match local rates)

1.5 Ton System ($)

2 Ton System ($)

2.5 Ton System ($)

3 Ton System ($)

3.5 Ton System ($)

4 Ton System ($)

5 Ton System ($)

Required Tonnage

4.0 tons

48,000 BTU/h

Recommended Size

4 Ton

48,000 BTU/h

System Cost

$7,000.00

+0% headroom

Annual Cost (16 SEER)

$585.00

Moderate climate

System Size	Sizing	Installed Cost
1.5 Ton (18,000 BTU/h)	Undersized (-63%)	$3,500.00
2 Ton (24,000 BTU/h)	Undersized (-50%)	$4,200.00
2.5 Ton (30,000 BTU/h)	Undersized (-38%)	$4,800.00
3 Ton (36,000 BTU/h)	Undersized (-25%)	$5,500.00
3.5 Ton (42,000 BTU/h)	Undersized (-13%)	$6,200.00
4 Ton (48,000 BTU/h)Best value	Adequate (+0%)	$7,000.00
5 Ton (60,000 BTU/h)	Adequate (+25%)	$8,500.00

Annual Operating Cost by SEER Rating (4 Ton)

14 SEER

$668.57

/year

16 SEER

$585.00

/year

18 SEER

$520.00

/year

20+ SEER

$468.00

/year

Recommended: 4 Ton system at $7,000.00For 2,000 sq ft with 8 ft ceilings in a moderate climate, you need approximately 4.0 tons of cooling capacity. The 4 ton system provides 48,000 BTU/h with 0% headroom above the calculated requirement. At 16 SEER, estimated annual operating cost is $585.00.

This is a rule-of-thumb estimate for planning purposes. Actual HVAC sizing depends on insulation levels, window area, sun exposure, ductwork condition, and local climate extremes. For accurate sizing, request a Manual J load calculation from a licensed HVAC contractor before purchasing equipment.