Energy and Power Converter
Convert power between watts, kilowatts, horsepower, BTU per hour and tons of cooling, and energy between kWh, joules, kilocalories and BTU.
Kilowatts (kW)
5.2753
- Watts (W)
- 5,275.2793
- Horsepower, mechanical (hp)
- 7.0743
- Metric horsepower (PS)
- 7.1724
- BTU per hour
- 18,000
1.5 tons of refrigeration is 5.2753 kilowatts.
How it's worked out
- In watts
1.5 × 3,516.8528425,275.2793
All units
| Unit | Value |
|---|---|
| Watts (W) | 5,275.279263 |
| Kilowatts (kW) | 5.275279 |
| Horsepower, mechanical (hp) | 7.074266 |
| Metric horsepower (PS) | 7.172384 |
| BTU per hour | 18,000 |
| Tons of refrigeration | 1.5 |
| kcal per hour | 4,535.9237 |
Key conversions
1 hp = 745.7 W · 1 ton of cooling = 12,000 BTU/h = 3.517 kW · 1 kWh = 3.6 MJ = 860 kcal = 3,412 BTU
Worked example
1.5 tons of cooling is 1.5 × 3,516.85 W = 5,275 W, or 5.28 kW, and 18,000 BTU per hour.
Questions people ask
How many kW is a 1.5-ton AC?
A ton of cooling is 3.517 kW of cooling power, so 1.5 tons is 5.28 kW of cooling, or 18,000 BTU per hour. The electricity it uses is less, often 1.2 to 1.8 kW.
How many watts is 1 horsepower?
745.7 watts for mechanical horsepower, or 735.5 watts for metric horsepower (PS).
How many kcal is 1 kWh?
About 860 kcal.
About this calculator
Formula and rules last checked 25 October 2026Written and tested by the CalculatorDex teamReport a problem