BTU/Tonnage Calculator

Convert cooling capacity units and estimate tonnage from room size.

Input Value

Standard AC Sizes

TonsBTU/hrSq Ft Range*
1.518,000600-900
2.024,000800-1,200
2.530,0001,000-1,500
3.036,0001,200-1,800
3.542,0001,400-2,100
4.048,0001,600-2,400
5.060,0002,000-3,000

*Approximate range for average conditions. Actual sizing depends on climate, insulation, and other factors.

Conversion Factors

  • 1 Ton = 12,000 BTU/hr
  • 1 kW = 3,412 BTU/hr
  • 1 MBH = 1,000 BTU/hr
  • 1 Ton = 3.517 kW