BTU to Watts Calculator
BTU/hr to watts converter for HVAC systems.
Heat Output
BTU/hr thermal capacity
BTU to Watts Calculator
Convert Btu/h, watts and tons
Input Parameters
Btu/h
BTU Conversion
• 1 Btu/h = 0.2930711 W (NIST SP 811)
• 1 ton = 12,000 Btu/h
• 1 kW = 3,412.14 Btu/h
Calculation Results
Thermal Power
Btu/h:
24,000
Watts:
7,033.71 W
Kilowatts:
7.034 kW
Tons (Btu/h ÷ 12,000):
2
Common BTU to Watts Conversions
Air Conditioner Sizes
| Tons | BTU/hr | Thermal Watts |
|---|---|---|
| 0.75 | 9,000 | 2,638 W |
| 1.0 | 12,000 | 3,517 W |
| 1.5 | 18,000 | 5,275 W |
| 2.0 | 24,000 | 7,034 W |
| 2.5 | 30,000 | 8,792 W |
| 3.0 | 36,000 | 10,551 W |
| 3.5 | 42,000 | 12,309 W |
| 4.0 | 48,000 | 14,067 W |
| 5.0 | 60,000 | 17,584 W |
Understanding HVAC Efficiency Ratings
Cooling Efficiency Metrics
EER (Energy Efficiency Ratio)
BTU/hr cooling ÷ Watts input at 95 °F
SEER (Seasonal EER)
Seasonal average efficiency
Heating Efficiency Metrics
COP (Coefficient of Performance)
Heat output ÷ Energy input
HSPF (Heating Seasonal Performance Factor)
BTU heating ÷ Watt-hours (seasonal)
Related HVAC & Electrical Calculators
Professional HVAC Installation Required
BTU calculations are critical for proper HVAC system sizing. Undersized equipment won't maintain comfort, while oversized systems short-cycle, reducing efficiency and lifespan. Size the equipment from a Manual J load calculation. Installation requires EPA 608 certification for refrigerant handling and electrical licensing for power connections. Consult qualified HVAC professionals for system design and installation.