BTU Calculator

Estimate the BTU/hr needed to heat or cool a room based on size, insulation, climate, and occupancy.

Room Details

Room Area
300 ft²
BTU/hr Needed
6,000
Tons
0.50
kW
1.76

BTU Reference by Room Size

Room SizeBTU/hr (cooling)Tons
150 ft²5,0000.4
250 ft²6,0000.5
300 ft²7,0000.6
350 ft²8,0000.7
400 ft²9,0000.8
450 ft²10,0000.8
550 ft²12,0001.0
700 ft²14,0001.2
1000 ft²18,0001.5
1200 ft²21,0001.8
1400 ft²23,0001.9
1600 ft²24,0002.0

Unit Conversions

1 Ton (AC)12,000 BTU/hr
1 kW3,412 BTU/hr
1 BTU/hr0.000293 kW