BTU Calculator | Smart Air Conditioner Sizing &...
Calculate the cooling and heating BTUs needed for your space using our BTU calculator. Size your air conditioner or heater in BTU/hr and Tons using room sizes and insulation...
Inputs Configuration
Calculation Output Status
Successfully Solved
Solved
AREA SQ FT225
VOLUME CU FT1800
COOLING BTU4500
COOLING TONS0.38
HEATING BTU9000
HEATING KW2.64
SUGGESTED AC SIZE5,000 - 6,000 BTU (Small Bedroom)
Step-by-Step Derivation Logs
1. Calculate floor area: 15.0 ft × 15.0 ft = 225.0 sq ft.
2. Calculate room volume: 225.0 sq ft × 8.0 ft = 1800.0 cu ft.
3. Base cooling load (20 BTU per sq ft): 225.0 × 20 = 4500 BTU/hr.
4. Total cooling load: 4500 BTU/hr (0.38 Tons).
5. Heating load (Climate factor = 40 BTU/sqft, insulation factor = 1.00): 225 × 40 × 1 = 9000 BTU/hr (2.64 kW).