Convert power units between Watts, Kilowatts, Horsepower, Megawatts, BTU/hr, and Refrigeration Tons with real-time bidirectional calculations.
| Power Unit | Symbol | Converted Value | Action |
|---|
Power is defined in physics as the rate of doing work or the rate at which energy is transferred or converted over time. In the International System of Units (SI), power is measured in Watts (W), named in honor of Scottish engineer James Watt. One Watt is equivalent to one joule of energy transferred per second (1 W = 1 J/s). In automotive, HVAC, electrical, and mechanical engineering, varying regional and historical units like horsepower (hp), BTU/hr, and Tons of Refrigeration (TR) are universally used.
| Unit | Symbol | Base Value in Watts (W) |
|---|---|---|
| Watt (SI Base) | W | 1 Watt (1 Joule/second) |
| Kilowatt | kW | 1,000 Watts (103 W) |
| Megawatt | MW | 1,000,000 Watts (106 W) |
| Gigawatt | GW | 1,000,000,000 Watts (109 W) |
| Horsepower (Mechanical) | hp(I) | 745.699872 Watts (~746 W) |
| Horsepower (Metric PS) | hp(M) | 735.49875 Watts (~735.5 W) |
| BTU per Hour | BTU/hr | 0.29307107 Watts |
| Ton of Refrigeration | TR | 3,516.85284 Watts (12,000 BTU/hr) |
| Foot-Pounds per Second | ft·lb/s | 1.35581795 Watts |
hp = kW × 1.341022 (e.g., 100 kW × 1.341 = 134.1 hp)kW = hp × 0.7457 (e.g., 200 hp × 0.7457 = 149.14 kW)Watts = kW × 1000BTU/hr = TR × 12,000 (e.g., 2 Ton AC = 24,000 BTU/hr)kW = BTU/hr × 0.00029307Fast review — stays on this site