Air Conditioning Size Calculator and Estimator Chart

HVAC Design and Engineering

This AC size calculator.

This calculator is provided for use to calculate basic size in BTU to adequately cool a room of know size.

The sizing chart below the calculator is useful to help you determine your approximate air conditioner size requirement in Tons.

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Preview Calculator AC Required Preview

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Estimated Air Conditioning Required in Tons based on Square Footage

Tons	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5
1.5	600 - 900 sf	600 - 950 sf	600 - 1000 sf	700 - 1050 sf	700 - 1100 sf
2	901-1200 sf	951 - 1250 sf	1001 - 1300 sf	1051 - 1350 sf	1101 - 1400 sf
2.5	1201 - 1500 sf	1251 - 1550 sf	1301 - 1600 sf	1351 - 1600 sf	1401 - 1650 sf
3	1501 - 1800 sf	1501 - 1850 sf	1601 - 1900 sf	1601 - 2000 sf	1651 - 2100 sf
3.5	1801 - 2100 sf	1851 - 2150 sf	1901 - 2200 sf	2001 - 2250 sf	2101 - 2300 sf
4	2101 - 2400 sf	2151 - 2500 sf	2201 - 2600 sf	2251 - 2700 sf	2301 - 2700 sf
5	2401 - 3000 sf	2501 - 3100 sf	2601 - 3200 sf	2751 - 3300 sf	2701 - 3300 sf

sf = Square Foot

Zone 1 = Red
Zone 2 = Orange
Zone 3 = Yellow
Zone 4 = Green
Zone 5 = Blue

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